According to the Optimal Foraging Theory, animals feed optimally when they "choose" their prey items based on profitability. Profitability represents the ratio between energy gain and time spent handling a given food item. Based on this definition, can you write your own formula for profitability? Try first without looking at your notes. If you can't figure it out, have a look at the class notes. Problem: Consider an American Robin foraging in the green areas around the ISC building here at UMass Boston. Imagine that the bird finds two prey items: an earthworm and a cricket. The as an energy content of approximately 2023.2 KJ, their handling time of 5.3 seconds, while the cricket's energy content is aproxim2242.62 KJ, with a profitability of 367.6 KJ/s. Base on these values, the Profitability of the earthworm is 381.7 KJ/s, and the handling time of the cricket is 6.1 seconds