3. Let f(x) = 2x + 1. (a) (5 points) Estimate the area between f and [0, 2] by dividing the interval into 4 subintervals and computing > f(x*)Ax, where xx is the right endpoint of each subinterval. k = 1 (b) (5 points) Find the exact area in two ways: first, by using the Fundamental Theorem of Calculus to compute (2x + 1) dx, and second, by drawing a picture and using geometry