Generate a 3 x 7 matrix (name it as A) that contains containing random numbers from a a standard normal distribution. Set the random seed to be 2. (a) Create a 2 x 3 matrix (name it as B) from the first and last row and the last two columns of matrix A. (b) Create a 2 x 6 matrix (name it as C) such that its first row includes the elements of the second column of matrix A followed by the elements of the last column of matrix A, and the second row includes the first six elements of the second row of matrix A