The Graph of a Function $f$ On the Interval $[ 0,8 ]$

Short Answer

The graph of a function $f$ on the interval $[ 0,8 ]$ is shown in the figure. Compute the Riemann sum for $f$ on $[ 0,8 ]$ using four subintervals of equal length and choosing the evaluation points to be (a) the left endpoints, (b) the right endpoints, and (c) the midpoints of the subintervals.