Using matlab

Matrix manipulation.

Create a random matrix of A of size 4x3 using the command rand

Create a submatrix B composed of the elements of A that are located in rows 3 to 4 and columns 2 to 3

Create a vector C and vector D composed of the 1^st row and 1^st column of A, respectively

Create two new matrices by appending vector C as the last row, and appending vector D as the column of A.

Replace the 1^st column of A by the summation of 1^st and 3^rd columns of A