Write a function that creates a matrix m x n in whichthe value of each element of the matrix is the sum of the indices for that cell. So, for example, the value of A(1,1) is 2, A(1,2) is 3, and A(3,6)is 9. Inputs m&n, output matrix A. Write the code

A(1,1)=2 A(1,2)=3 A(3,6)=9