3- For matrices A and B given below, determine a) 3A - 4 B b) A.*B c) A * (- B) d) A(3) + B(1,end) 15 A = 1533 and B = 13 2 4- If matrix M is of size 5x5, write Matlab command to define matrix L that includes third row and first row for columns two, three and four of matrix M. Q 41 5- Write Matlab command in block form to construct the following matrix: 2 3 41 5 6 7 0 0 0 01 = TOL 1 0 0 1 1 1 1 10 6 1491 3 OO 0