You have to create a zero matrix of size (mxn) whose inputs are m and n and the elements of your matrix should be zeros.
If input is m=2 and n=3 then
A = [ 0 0 0
0 0 0 ]
Find state names that end with the letter A
Find the largest value in the 3D matrix
Reverse a matrix
Area of a circle
Replacing a row
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