In the following integrals, change the order of integration, sketch the corresponding regions, and evaluate the integral both ways (a) ∫10∫1x xydydx(b) ∫π/20∫cosθ0 cosθdrdθ(c) ∫10∫2−y1 (x+y)^2 dxdy(d) ∫ba∫ya f(x, y)dxdy∫(express your answer in terms of antiderivatives)