Answer
a) Please see the first screenshot.
b) Please see the first screenshot.
c) Please see the second screenshot.
Work Step by Step
a) This screenshot shows the marginal product for each hour.
b) The first few hours of the fisherman's time have the highest output. However, as the fisherman spends more time fishing, his marginal output decreases.
c) If the fisherman doesn't go fishing, he still has his fixed cost of 10 dollars. Each hour that passes, the fisherman incurs a cost of 5 dollars (his opportunity cost).
