Answer:
For the competitive firm marginal cost is $5. For the monopolist marginal cost is less than $5.
Explanation:
The price of the product of the competitive firm is $5. We know that a competitive firm is a price taker and produces at the point where the price is equal to the marginal cost of producing the last unit.
A monopolist, on the other hand, is a price maker. It produces at the level of output where the price is greater than the marginal cost of producing the last unit.