Here is how the second comment reads on "The This Keyword" exercise:
// and down here we just use the method we already made
I think it would be better if the comment read:
//and down here we take the setAge function, created above, and make it a method of the bob object.
I think this is more accurate because the function was just a function until it was placed inside of the bob object.
Maybe I'm nitpicking but I was confused about the term "method" because when I first looked at it, it didn't exist inside of an object.
Replace this line with your code.