CSS Grid - Divide the Grid Into an Area Template - how to fix this

Tell us what’s happening:
Describe your issue in detail here.

  **Your code so far**

/* Only change code below this line /
“header header header”
“advert content content”
“advert footer footer”;
/
Only change code above this line */
}

  **Your browser information:**

User Agent is: Mozilla/5.0 (X11; Linux x86_64; rv:101.0) Gecko/20100101 Firefox/101.0

Challenge: CSS Grid - Divide the Grid Into an Area Template

Link to the challenge:

You have to make footer span the entire bottom row