A store manager estimates that the demand for an energy drink decreases with increasing price according to the function dlp} = , which means that at price p p2+3 [in dollars}, dp} units can he sold. The revenue generated at price p is Rp}=p-d(p} [price multiplied by number of units}. a. Find and graph the revenue function. h. Find and graph the marginal revenue R'[p}. c. From the graphs of R and R', estimate the price that should he charged to maximize the revenue