The figure to the right shows four regions bounded by the graph of y=xsin x: R1, R2, R3, and R4, whose areas are 1, π-1, +1, and 2-1, respectively. Use this information to evaluate the following integral. 2π S π/2 x sin x dx Area = 1 R₁ 플 R₂ y = x sin x Area = -1 Area =+1 T R3 R₁ 2π S x sin x dx = (Type an exact answer, using as needed.) π/2 Area 2-1