Intermediate Scripting: Make a Person

Ok, I know what a constructor function is, I know what setter and getter are. But I have no f** idear, what I have to do in this challenge. The Problem Explanation isnt usefull too.
So I have also still no code. Maybe someone can help me.

var Person = function(firstAndLast) {
// Only change code below this line
// Complete the method below and implement the others similarly
this.getFullName = function() {
  return "";
return firstAndLast;

var bob = new Person('Bob Ross');

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Challenge: Make a Person

Link to the challenge:

Hi. It might be helpful to review this lesson on constructors:

This lesson and the following lessons explain how constructors work and how to add methods to objects.

So in this case you need to add 6 methods (the first has been started) that let you get and set the first, last, and full name of this person object.