a. Assume that Bart and Lisa live on a desert island. With a day's labor, Lisa can produce either 5 fish or 4 coconuts; Bart can produce either 6 fish or 3 coconuts. The unit opportunity cost of fish should be _______ for Bart and ______ for Lisa

3 coconuts; 4 coconuts

2 fish; 1.25 fish

0.5 coconut; 0.8 coconut

6 coconuts; 5 fish