A. (x - 1)(x - 2)(x - 3) b. (x - 1)(x + 2)(x - 3) c. (x + 1)(x - 2)(x - 3) d. (x + 1)(x + 2)(x - 3)

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.