Please assist with the given questions.
Question 1: Does the PPC illustrate increasing or decreasing opportunity cost?
Question 2: What is the opportunity cost for this student for the additional amount of study time on economics required to mover her grade form 60 to 70?
Question 3: What is the opportunity cost for this student for the additional amount of study time on economics required to mover her grade from 90 to 100?
Economics Biology
100 40
90 60
80 75
70 85
60 93
50 98
40 100