Basic JavaScript - Explore Differences Between the var and let Keywords

I need help, I couldn’t find the solution.

let catName;
let catSound;
let quote;
function catTalk() {
  "use strict";

  catName = "Oliver";
  quote = catName + " says Meow!";
}
catTalk();

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Challenge: Basic JavaScript - Explore Differences Between the var and let Keywords

Link to the challenge:

The original code consisted of two lines.
They asked you to change those two lines to use let.

Not sure why you decided to add other lines of code?