Find the length of the curve. 4) x = - -y 1, 3/2 _ v 1/2 from x = 16 to x = 25 3 5) x = 2 (y 7 - 1) 3/2 from y = 4 to y = 9 3 6) y = (4 -x2/3) 3/2 from x = 1 to x = 8