Let A denote the average and M the median of the data set (x1, x2, x3,..., xN). Let c be any constant. (a) Find the average of the data set (x1 + c, x2 + c, x3 + c,..., xN + c) expressed in terms of A and c. (b) Find the median of the data set (x1 + c, x2 + c, x3 + c,..., xN + c) expressed in terms of M and c