Can someone help me with these questions?

Question 1:

The given curve is rotated about the yaxis. Find the area of the resulting surface. x2f3+y2f3=9, UEyEZ? calm Sketch the region bounded by the curves, and visually estimate the location of the centroid. y = 3/x, y = 0, x = 1, x =4 81 6 6 4 2 2 X X 1 2 3 4 O 1 2 3 4 O U 94 3- 3 N N X 2 3 4 5 6 X 1 3 4 5 6 O O 2 Find the exact coordinates of the centroid. (x, y) =|2,.8Find the centroid of the region bounded by the given curves. X+y=20, (,}}=(:| 3},