1. Enter the 3×4 matrix
Let a_{ij} denote the entry of A in the ith row and jth column.
Use Matlab to compute the following :
(a) a_{13} + a_{32}
(b) Three times the 3rd column of A
(c) Twice the 2nd row of A minus the 3rd row
(d) The sum of all the columns of A