The following table gives the willingness to pay for cars for eight individuals. There is a constant marginal cost of 30 to produce a car. Assume there are no fixed costs and that each individual chooses to either buy one car or zero.

Person Willingness to Pay

A 50

B 45

C 42

D 32

E 20

F 17

G 10

H 3

Determine consumer and producer surplus under perfect competition; the price, consumer and producer surplus under a monopolist who is unable to price discriminate; and the price, consumer and producer surplus with another one who is able to price discriminate.