please help me to solve these questions

1) Calculate the integral of f (x, y) = (x2 + y2)_3f2 (x2 + y2)3'2dA = D over the region at2 + y2 S 121, x + y 2 11 by changing to polar coordinates. 2) Use cylindrical coordinates to calculate n, f(x, y, z) dV for f(x, y, z) = x, x2 + y2 5 36, x 2 0, y 2 0, and -6 5 z 5 6. ff f(x.y,Z)dV = W 3) Convert from rectangular to cylindrical coordinates. (3, 3, 6)