11 points) At the bottom of Lake Superior, there are a lot of sunken logs. Most of these rolled off floating storage platforms used by logging companies between the Civil War and WWI. During this time, timber was abundant and it was easier to cut down another tree than to fish out a soaked log from the bottom of the lake. Today, however, the stock of old trees in Northern Wisconsin has been largely depleted. Using isoquants and isocost curves, graphically explain the lack of interest in these logs in the past, and why there is current renewed interest in the sunken logs as a possible productive input..