I need help I am using this templete for creating a website https://www.w3schools.com/bootstrap/trybs_theme_me_complete.htm#

Kind regards. I need help. I do not know what’s wrong with the templete i am using. I want to add images on the blocks of the website for every paragraph, I have tried to change the width and height classess of the images and I does not even appear. I do not know if I am modifying something wrong. Here is the code. Any help, well be welcome.

  <!DOCTYPE html>
  <html lang="en">
  <head>
    
    <title> SOFTWARE LIMITED</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="font-awesome/css/font-awesome.min.css">
    <link rel="icon" type="image/png" href="images/favicon">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
    <link href="https://fonts.googleapis.com/css?family=Montserrat" rel="stylesheet">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
    <style>

    body {
        font: 20px Montserrat, sans-serif;
        line-height: 1.8;
        color: #f5f6f7;
    }
    .bgimg-2 {
      background-image: url(images/img2.jpg);
      height: 400px;
      width: 100%;
      background-size: 100% 100%;
      border: 1px solid;
    }
    .caption {
    position: absolute;
    left: 0;
    top: 50%;
    width: 100%;
    text-align: center;
    color: #000;
  }

  .caption span.border {
    opacity: 0.6;
    background-color: #111;
    color: #fff;
    padding: 18px;
    font-size: 25px;
    letter-spacing: 10px;
  }
    p {font-size: 16px;}
    .margin {margin-bottom: 45px;}

    .bg-1 { 
        background-color: #1abc9c; /* Green */
        color: #ffffff;
      
    }
    .bg-2 { 
        background-color: #2f2f2f; /* Dark Blue */
        color: #ffffff;
    }
    .bg-3 { 
        background-color: #ffffff; /* White */
        color: #555555;
    }
    .bg-4 { 
        background-color: #2f2f2f; /* Black Gray */
        color: #fff;
    }
    .container-fluid {
        padding-top: 70px;
        padding-bottom: 70px;
    }
    .navbar {
        padding-top: 15px;
        padding-bottom: 15px;
        border: 0;
        border-radius: 0;
        margin-bottom: 0;
        font-size: 12px;
        letter-spacing: 5px;
    }
    .navbar-nav  li a:hover {
        color: #1abc9c !important;
    }
    .navbar-brand {
      background-image: url(images/Bussines-solutions--software.png);
      background-position: left top;
      background-size: 55px 55px;
      background-repeat: no-repeat;
    }
    
    </style>
  </head>
  <body>

  <!-- Navbar -->
  <nav class="navbar navbar-default">
    <div class="container">
      <div class="navbar-header">
        <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
          <span class="icon-bar"></span>
          <span class="icon-bar"></span>
          <span class="icon-bar"></span>                        
        </button>
        <a class="navbar-brand" href="#">__</a>
      </div>
      <div class="collapse navbar-collapse" id="myNavbar">
        <ul class="nav navbar-nav navbar-right">
          <li><a href="HowWeWork">HOW WE WORK</a></li>
          <li><a href="#">WHY US</a></li>
          <li><a href="#">INDUSTRIES</a></li>
          <li><a href="#">ADDRESING YOUR NEEDS</a></li>
          <li><a href="#">GET IN TOUCH</a></li>
        </ul>
      </div>
    </div>
  </nav>

  <!-- First Container -->
  <div class="container-fluid bgimg-2">
    <div class="caption"> 
    <span class="border" "> BUSINESS SOLUTIONS & SOFTWARE LIMITED</span>
    </div>  
  </div>

  <!-- Second Container -->
  <div class="container-fluid bg-2 text-center">
    <h3 class="margin">How we work</h3><a id="HOwWeWork"></a>
    <div class="col-sm-3"> 
    <p>
  1. Understanding your business challenge <br>
      - We will explore your business needs with you. No need to write any technical specification upfront. </p> </div>
  
  <div class="col-sm-3"> 
  <p>
  2. Creating and managing the project
      - We will transform your business challenge into an IT project. You don't need your own CTO or any Project Manager. </p> </div>
  <div class="col-sm-3"> 
  <p>
  3. Developing tech solution <br>
      - We will implement technical products to address your business needs. We will make sure the standards are held high. </p></div>
  <div class="col-sm-3"> 
  <p>
  4. Running and maintaining the product
      - We will cover whole life cycle of the product for you. Alternatively, we will help you to hire your own in-house team.</p> </div>
    <a href="#" class="btn btn-default btn-lg">
      <span class="glyphicon glyphicon-search"></span> Search
    </a>
  </div>

  <!-- Third Container (Grid) -->
  <div class="container-fluid bg-3 text-center">    
    <h3 class="margin"> <strong>Why us?</strong></h3><br>
    <div class="row">
      <div class="col-sm-4 icon">
        <p>* We embrace Agile
      - We breath for Agile. We understand that IT project cannot be planned years ahead.</p>
        <i class="fa fa-camera-retro fa-4x"></i> fa-4x
      </div>
      <div class="col-sm-4"> 
        <p>* We work very closely with our clients
      - We will discuss the project quite frequently. Be prepared to be a true part of our team.</p>
        
      </div>
      <div class="col-sm-4"> 
        <p>* We understand business challenges
      - Our team members have background in economics, corporate governance, finance and other business disciplines. We speak your language.</p>
        
      </div>
    </div>
  </div>
  
  <!--Industries -->
  
  <div class="container-fluid bg-2 text-center">
    <h3 class="margin">Industries</h3>
    <p>
  Our experts have taken part in projects (not only) in these industries:
  <br>
  * Banking
  <br>
  * Insurance
  <br>
  * E-commerce
  </p>

    </a>
  </div>

  <!-- Addresing your needs -->

  <div class="container-fluid bg-3 text-center">    
    <h3 class="margin">Addressing your needs</h3><br>
    <div class="row">
      <div class="col-sm-3">
        <p>* Open Banking
      - We will help you to gain from the APIs provided by the Open Banking initiative.
  </p>
         <img src="images/banking.jpg" class="img-responsive margin" style="width:20% height:20%" alt="Image">
      </div>
      <div class="col-sm-3"> 
        <p>* PSD2
      - We are closely monitoring changes coming with PSD2 regulation. We are here to help you to implement solutions leveraging PSD2.</p>
        
      </div>
      <div class="col-sm-3"> 
        <p>* GDPR
      - We understand that complying with a new EU regulation can be tricky. We will navigate your through the implementation process.</p>
      
      </div>
       <div class="col-sm-3"> 
        <p>* PCI/DSS
      - If you are building any platform concerned with payments, you might need our help to comply with PCI/DSS standards.</p>
        <img src="images/computer.jpg" class="img-responsive margin" style="width:100%" alt="Image">
      </div>
    </div>
  </div>

  <!-- Footer -->
  <footer class="container-fluid bg-4 text-center">
    <p>Getting in touch:
  <br>
  * Call us:  
  <br>
  * Write us:  email
  <br>
  * Skype us:  skype nickname</p> 
  
  </footer>

  </body>
  </html>