Consider the Riemann sum Le for the function f(T) = 3 – 2-4 on the interval (-1,2]. (a) Plot y = f(2), being sure to label the endpoints of the subintervals. Draw the six rectangles whose areas are the terms of Le. (b) Calculate L6. Give both the exact answer and an approximation rounded to one decimal place. (c) Based on your plot, does Lo appear to be an overestimate or an underestimate for the area?