The industry demand curve for a particular market is:

Q = 1800 - 200P.

The industry exhibits constant long-run average cost at all levels of output, regardless of the market structure. Long-run average cost is a constant $1.50 per unit of output.

A) what is the consumer surplus for perfect competition market?

B) what is the consumer surplus for pure monopoly market?

C) what is the market output for pure monopoly market?

D) what is the market output under first degree price discrimination?