Problem 3.3. The graph below shows demand for a monthly parking permit at a NJ transit station. 100 530 80 TO 60 50 4O 30 20 (a) If price rises from $20 to $40, what is 0 10 20 30 =10 50 60 TO 80 90 100 Q the change in revenue earned by NJ tran- (C) sit? Be sure to also indicate whether the change is positive (+} or negative (-} : If price rises from $60 to $80, what is the change in revenue earned by NJ tran- sit? Be sure to also indicate whether the change is positive (+} or negative H Calculate the elasticity of demand be- tween $20 and $40 using the midpoint method