1.	Find the value of .
		A.	24	B.	28
		C.	-24	D.	-28
		Hint
	2.	Find the inverse of .
		A.		B.
		C.		D.
		Hint
	3.	Solve the systems of equations by using matrix equations.
		A.		B.
		C.		D.
		Hint
	4.	Find the inverse of .
		A.	0	B.
		C.		D.	does not exist
		Hint
	5.	Find the inverse of .
		A.		B.
		C.		D.
		Hint