Calculate the areas of the following surfaces using the differential surface area dS: (a) = 2, 0

Question:

Calculate the areas of the following surfaces using the differential surface area dS:
(a) ρ = 2, 0 < z < 5, π/3 < Φ < π/2
(b) z = 1, 1 < ρ < 3, 0 < Φ < π/4
(c) r = 10, π/4 < θ < 2π/3, 0 < Φ < 2 π
(d) 0 < r < 4, 60° < θ < 90°, Φ = constant