Given the following matrix X; x = 2 2 3 4 5 6 4 6 8 10 12 a) Write a suitable MATLAB code to create a matrix Y only from the given matrix X above. Assume that X is already declared in the workspace. [1 2 3 4 5 6 Y 2 4 6 8 10 12 2 4 6 8 10 12] (5 marks) b) Consider the following MATLAB code. Determine the final values of a, n and Z. a = x(:, [2 4 6]) - 4; n logical (a); z = X(n); (5 marks)