V 7. Set up but do not calculate the integral to find the length of the ellipse = 1. 4 [Hint: Graph the ellipse and find the equation of the upper half of it.] 8. The given area is rotated about the y-axis. Find the area of the resulting surface. X=e, 0sys1 9. Sec 8.2 #28 If the infinite curve y = e *, x 2 0, is rotated about the x-axis, find the area of the resulting surface