You are given an integer array, nums, sorted in non-decreasing order. Your task is to return a new array containing the squares of each number, also sorted in non-decreasing order.

Constraints:

• $1 \leq$ nums.length $\leq 10^3$

• $-10^4 \leq$ nums[i] $\leq 10^4$

• nums is sorted in non-decreasing order.