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

__Question:__

For integers *m* and *n, *let A[m,n] = $\displaystyle {m \le x \le n}$ where x is an integer.

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

(b) For $\displaystyle m \le n $, write down a formula in terms of *m* and *n,* for the size of the set A[m,n]. Justify your answer by giving an explicit $\displaystyle f:N_k \to A[m,n] $, for an appropriate value of k.

__My attempts:__

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