A large urban hospital produces solid waste. The table below shows the hospital’s marginal cost of reducing waste and the marginal benefit to society of doing so.

Tonnes of waste abated	MC($)	MB($)
1st	1000	4000
2nd	1500	3800
3rd	2000	3500
4th	3000	3000
5th	4500	2000
6th	7000	MB($)

a. Draw a scale diagram of the marginal costs and benefits of reducing solid waste.

b. What is the socially optimal amount of waste to abate?

c. What is the net benefit to society of abating the socially optimal amount of waste?

d. What is the net benefit to society of abating the final tonne of waste if the hospital abates six tonnes?