dont get it

answer options for a:

q=5 q=20 q=15 q=10 for

b:

Suppose that the market demand is given by Q=102-p and that all firms in the market are identical and face the cost function C(Q)=300+3q2+2q.

a. Derive the individual Average Cost function, and individual Marginal Cost function. What is the individual quantity that minimises average costs?

b. What are the long-run equilibrium market quantity and price in this market?

c. What is the long-run equilibrium number of firms?

d. Suppose that demand now increases to Q=120-p. What happens to the longrun equilibrium market price, market quantity and number of firms?

(Q,P)=(54,97)

(Q,P)=(25,57)

(Q,P)=(34,67)

(Q,P)=(40,62)

c: 8 or 4 or 2 or 6

d: The price increases, quantity decreases and number of firms increases.

The price is unchanged, quantity increases and number of firms increases.

The price is unchanged, quantity increases and number of firms decreases.

The price increases, quantity increases and number of firms increases.