(P8.1.7.) Suppose we have a length-n vector and that n is a multiple of k.In a perfect k-shuffle we reorder the components by dealing out the cards to k players and then reassemble the deck, putting Player 1s cards first, Player 2s cards second, etc. For example, if n = 12, k = 4, and x= A B C D E F G H I J K L then y= A E I B F J C G K D H L is its perfect 4-shuffle. Notice that in a perfect k-shuffle, Player i receives cards i, i + k, i + 2k, etc.

(a) Write a function in MATLAB y = Perfect k Shuffle(x,k) that performs this permutation on x. Do not use reshape.