Question: Write a function matMul in python , which accepts two arguments. When being called as matMul(A,B) with matrices A, B the function must return the

Write a function matMul in python, which accepts two arguments. When being called as matMul(A,B) with matrices A, B the function must

return the matrix product A*B, if isMatrix(A) and isMatrix(B) are both True and the number of columns in A is equal to the number of rows in B;

otherwise the function must return a string "invalid arguments"

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