(a) Estimate the area under the graph of $f(x) = 3/x$ from $x = 1$ to $x = 5$ using four approximating rectangles and right endpoints.

$R_4 =$

(b) Repeat part (a) using left endpoints.

$L_4 =$

(c) By looking at a sketch of the graph and the rectangles, determine for each estimate whether is overestimates, underestimates, or is the exact area.

? Underestimate Overestimate Exact  1. $R_4$

? Underestimate Overestimate Exact  2. $L_4$