4. The table below shows price and quantity demanded for a market in which there is a single (monopoly) firm, as well as marginal cost. Use the information in the table to find the monopolist's optimal price and quantity. Price Quantity Marginal Cost $100 0 N/A $90 7 $80 2 15 $70 3 24 $60 30 $50 42 $40 6 56 $30 62 $20 75 $10 9 97 The monopolist will charge of $. and produce a quantity of units