Answer: Q0; P3
Explanation:
The profit-maximizing monopolist produces Q0 units and charges a price of P3.
According to the exhibit graph, the monopolist will produce Q0 units. This is because a monopoly maximises profit at the point where Marginal Revenue equals Marginal Cost. Looking at the chart, the quantity of output where this happens is Q0.
The Monopolist will then charge a price of P3. After the profit-maximising output is realized, the way to find out the price the monopolist will sell at is the point where the output produced intersects with the Demand curve. At this point, the price listed is what people are willing to buy that amount of quantity for and so the Monopoly will sell at that price.