1. Estimate the area under the curve f (x) = -x2 + 5x - 3 using a midpoint Riemann sum, with 3 rectangles, on the interval (-2, 1] . -77 O -21 O 11 O 41 O -41 - 362. Using the following function, estimate the area under the curve using the Left End Point Method with 4 rectangles. f (m) 2 E + 1 on the interval [0, 4] O5+x/+x/ OZ-l-Zx/g O7+\\/+\\/ O5+x/ O7+~/ 3. Using the following function, estimate the area under the curve using the Right End Point Method with 4 rectangles. f (3:) = 3% 2 on the interval [0, 4] O 1+3\\/ O 1+3\\/+3\\/ O 5+3\\/+3\\/ O 1+3\\/+3\\/ O 1+3\\/ 4. Use the Rectangular Approximation Method to approximate the area of f (at) = 9:5 on the interval [0,2] with 4 rectangles, using the right side of the rectangles