1.	What are the coordinates of the midpoint of the segment with endpoints C(2, -4, 6) and D(7, 2, -5)?
		A.	(-2.5, -3, 5.5)	B.	(5, 6, -11)
		C.	(9, -2, 1)	D.	(4.5, -1, 0.5)
		Hint
	2.	Find the midpoint of the line with endpoints of (-4, -2, 4) and (3, 7, 2).
		A.	(-4, 2, 3)	B.	(-1, 4, 2)
		C.	(-3.5, -4.5, 1)	D.	(-0.5, 2.5, 3)
		Hint
	3.	One airplane has coordinates of (15, 25, 62) and a second airplane has coordinates of (2, -14, 92). How far apart are the two planes?
		A.	19.1	B.	146.8
		C.	50.9	D.	155.2
		Hint
	4.	Find the midpoint of the segment with endpoints P(0, 0, 4) and Q(0, -1, 6).
		A.	(0, -1, 10)	B.	(0, -0.5, 5)
		C.	(0, 0.5, -1)	D.	(0, -2, 20)
		Hint
	5.	Find the midpoint of the segment with endpoints R(20, -2, 18) and S(19, -8, 40).
		A.	(39, -10, 58)	B.	(-19.5, 5, -29)
		C.	(78, -20, 116)	D.	(19.5, -5, 29)
		Hint