P=100-Q, Each firm has the same cost structure (constant returns to scale) given by AC=MC=40.

homogenous, so consumers indifferent from which firm they purchase. Firms maximize profit.

a. If the market is perfectly competitive, what is the equilibrium value of each of the following?

1. Price.
2. Quantity.
3. Consumer surplus.
4. Producer surplus (profit).
5. Deadweight loss.

b. Suppose instead the market is transformed into a non-discriminating (single-price) monopoly with barriers to entry. what is the equilibrium value of each of the following?

1. 1.Price.
   1. Quantity.
   2. Consumer surplus.
   3. Producer surplus (profit).
   4. Deadweight loss.