Compute the flux of the vector field

Compute the flux of the vector field F =>=> through the surface S where S is the surface bounded by r - 2, 2 - 0, 3 - 5 in the first octant. Round off answer to 2 decimal places. Hint: if the coordinates are in cylindrical form, then it can be shown that 1 a 1 a a divF- (f.) + r 20 (fo) + 2z (f. ) r