Question: a . Create a 4 - by - 5 matrix of 1 s using ones ( ) function, assign this matrix to variable

a. Create a 4-by-5 matrix of "1"s using ones() function, assign this matrix to variable A.
b. Create a 4-by-5 matrix of "0"s using zeros() function, assign this matrix to variable B.
c. Replace the 3-by-3 submatrix at the lower left corner of B with a 3-by-3 identitty matrix.
d. Add A to B, store the resulting matrix in variable C.

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