i just need help doing it by hand

3. Solve the following matrix problems by hand. Show your work step by step (write out each of the dot products). 0 3 (a) A. B where A = [2 6 3) and B = -- 2 (b) BA where A and B are the same as in Problem 1. [2 37 (c) ATB where T denotes transpose and A = 4 5 and B 6 7 10 6 2 9 5 1 8 -4 0