6.Suppose a monopolist faces a demand equation given by P=20-Q, and a marginal revenue equation given by MR = 20-2Q, and MC=AVC=ATC=$6. What is the profit-maximizing price for the monopolist?

A)$13

B)$2

C)$6

D)$1

Continue with question 6: What is the profit-maximizing quantity for the monopolist?

A)20

B)7

C)14

D)22

If a monopolist sells 10 units of output for $7 each and 11 units of output at $6 each, what is the marginal revenue associated with the 11th unit?

A)$6

B)$4

C)-$4

D)-$6