The following numbers measure the tradeoff between grades and income: Total Hours Hours Hours Studying GPA Working Income 60 60 4.0 0 $ 0 60 40 3.0 20 $100 60 30 2.0 30 $150 60 10 1.0 50 $250 60 0 0.0 60 $300 Total Hours Hours Hours Studying GPA Working Income 60 50 4.0 10 $ 60 60 40 3.0 20 $120 60 20 2.0 40 $240 60 10 1.0 50 $300 60 0 0.0 60 $360 a. Define comparative advantage. b. Does either individual (the one in exercise 4 or the one in exercise 5) have a comparative advantage in both activities? c. Who should specialize in studying and who should specialize in working?