Hello, all! I've spent the last 2 hours trying to do this question, and my paper is still blank!

Question:

For integersmandn,let A[m,n] = where x is an integer.

(a) List all the members of the set [-2,4]

(b) For , write down a formula in terms ofmandn,for the size of the set A[m,n]. Justify your answer by giving an explicit , for an appropriate value of k.

My attempts:

(a) {-2, -1, 0, 1, 2, 3, 4}

(b) I'm thinking the formula will be n-m? ButI have no real idea, to be honest.

Please help. Thank you.