Problem 3: Use right-hand-side method to approximate the area under the graph of a) f(x) = 0.01x4 - 1.44x2 + 60, over the interval [ 2, 10] using 4 subintervals. b) f(x) = 0.1x3 + 1.2x2 - 0.4x - 48, over the interval [-10, - 4] using 6 subintervals