(1 point) Book Problem 6 Estimate the area under the graph of f(x) = 512 from x = O to x = 2 using the midpoint rule with n = 4. (round your answer to six decimal places) M4: The speed of a runner increased steadily during the first three seconds of a race. Her speed at half-second intervals is given in the table: t(s) 0 v(ft/s) 1.5 0.5 1 1.5 2.6 5.4 7.9 2 2.5 10.1 13.5 3 17.7 (a) Find a lower estimate for the distance that she traveled during these three seconds. (b) Find an upper estimate for the distance that she traveled during these three seconds