1. Suppose that in a competitive market for ukuleles, three buyers (Peter, Paul, and Mary) have the marginal benefit (MB) schedules below.

Quantity	MBPeter ($)	MBPaul ($)	MBMary ($)
1	150	140	130
2	120	110	100
3	90	80	70
4	60	50	40
5	30	20	10

1. If the equilibrium price is $80, calculate the following:
2. The quantity purchased by each buyer.
3. The consumer surplus for each buyer.
4. The consumer surplus for the market as a whole.

Using the answers you provided above for Problem 1, verify that the three efficiency conditions are satisfied for the ukulele market.