The matrices [b]A, B, C[/b] are defined as follows[br][br]Calculate:[br] [br] D=A+B E= A-C F= A+B-C [br] G=12B H=2A-C I=2A+0.5C[br] J=2A[sup]T [/sup]K=A[sup]T[/sup]+3C[sup]T[/sup].[br]