16 The figure to the right shows the velocity, v (in feet/second), of a runner for 0

The figure to the right shows the velocity, v (in feet/second), of a runner for 0 t 5 seconds and the rectangles used to estimate the distance traveled. (a) Do the rectangles represent a left or a right sum? Choose one (b) Do the rectangles lead to an upper or a lower estimate? Choose one (c) What is thc value of n? (d) What is t lie value of At?