For the next three questions, assume a firm has the total cost function

c(q) = 12 + 10q - 2q² + q³/3.

1. What is the firm's average variable cost function?

a. 12/q + 10 - 2q + q²/3

b. 10q - 2q² + q³/3

c. 10 - 2q + q²/3

d. 10 - 4q + q²

2. What is the firm's marginal cost function?

a.10q - 2q² + q³/3

b.10 - 4q + q²

c.10 - 2q + q²/3

d.12/q + 10 - 2q + q²/3

3. If the price of the firm's product is 6, what quantity should the firm produce?

a.0

b.1

c.2

d.3

e.4

f.5

g.6

h.7

i.8

j.9

k. 10