Please help with following question:

Given the following matrices, complete the indicated operations. If they are not possible, explain why. -2 -4 -4 2 2 -5 6 -8 6 8 -4 D = 6 -8 12 4 A = B = C = 4 3 -2 4 2 -4 10 4 6 8 14 -5 2 4 1 -3 -1 5 7 -7 3 -5 E = 3 6 7 -13 F = 5 3 11 -3 G = -3 -9 1 -5 8 -7 -2 -1 -9 7 15