1.	Which product is not defined?
		A.
		B.	[11 4 -3]
		C.	[16 12 5]
		D.
		Hint
	2.	Find
		A.		B.
		C.		D.
		Hint
	3.	If and find 4A – 5B.
		A.		B.
		C.		D.
		Hint
	4.	State whether the product of A3 × 4 and B3 × 4 is defined, and if it is defined, state the dimensions.
		A.	defined, 9 × 16	B.	undefined
		C.	defined, 4 × 3	D.	defined, 3 × 4
		Hint
	5.	Find the product of
		A.
		B.
		C.
		D.
		Hint