Use a calculator and right Riemann sums to approximate the area of the given region. Present your calculations in a table showing the approximations for n = 10, 30, 60, and 80 subintervals. Comment on whether your approximations appear to approach a limit.

The region bounded by the graph of f (x) = 2 - 2 sin x and the x-axis on the interval [-π/2, π/2]