Need some help with these problems

MC ATC 25 20 AVC 10 . D `MR 100 120 140 180 Q 1- The profit-maximizing level of output is...................... units a. 100 c. 140 b. 120 d. 180 e. 20 2- The profit-maximizing price of the monopoly is a. $25 C. $18 b. $20 d. $15 e. $8 3- At the profit- maximizing level of output, ATC of the firm is a. $25 C. $18 b. $20 d. $15 e. $84- At the profit-maximizing level of output, AVC of the firm is a. $25 C. $18 b. $20 d. $15 e. $8 5- At the profit-maximizing level of output, AFC of the firm is a. $25 C. $7 b. $9 d. $15 e. $8 6- At the profit-maximizing level of output, TR of the firm is a. $2400 c. $2520 b. $1800 d. $2500 e. $800 7- At the profit-maximizing level of output, TC of the firm is a. $1500 c. $3000 b. $1000 d. $700 e. $800 8- At the profit-maximizing level of output, the profit of the firm is a. $1500 c. $3000 b. $1000 d. $700 e. $800 9- If the firm were a perfectly competitive business, the output would be. a. 100 c. 140 b. 120 d. 180 e. 20 10- If the firm were a perfectly competitive business, the price would be... a. $25 c. $18 b. $20 d. $15 e. $8 11- Which of the following markets is the most efficient market? a. Perfectly competitive market c. Monopolistic completion market b. Monopoly market d. Oligopoly market 12- An example of a legal monopoly is a- law offices c- U.S. Postal Service b- supreme court d- Federal Express13- For a monopolist to sell one more unit of a good they should a- lower the price c- advertise b- raise the price d- do nothing e- none of the above 14- Marginal revenue is a- the same as the price b- revenue earned marginally by the business c- more than price d- revenue earned from selling one more unit of a good e- none of the above 15- if MR > MC, the monopolist should a- raise the price to sell less b- lower the price to sell more c- keep the price the same and try to sell more d- raise the price and sell more e- none of the above 16- if MR