Write and test the code for the function mystery Function that consumes a vector, V, and produces a new vector, W, of the same length where each element of W is the sum of the corresponding element in V and the previous element of V. Consider the previous element of V (1) to be 0. For example, mystery Function (1:8) should return [1 3 5 7 9 11 13 15] and mystery Function ([1: 6].^2) should return [1 5 13 25 41 61]