1.	Which product is not defined?
		A.
		B.
		C.	[16 12 5]
		D.	[11 4 -3]
		Hint
	2.	Find the dimensions of A6 × 3 · B3 × 1.
		A.	6 × 1	B.	3 × 1
		C.	6 × 3	D.	3 × 3
		Hint
	3.	Find
		A.		B.
		C.		D.
		Hint
	4.	Find the product of
		A.
		B.
		C.
		D.
		Hint
	5.	Given that and use the fact that to find AB + AC.
		A.		B.
		C.		D.
		Hint