I'm currently trying to study for my upcoming final but unsure how to approach these problems. Would really love some help, thank you!

QUESTION 4 Scenario A monopoly firm maximizes its profit by producing Q = 800 units of output. At that level of output, its marginal revenue is $30, its average revenue is $60, and its average total cost is $34. Refer to Scenario. At Q = 800, the firm's profit is o a. $13,000. ob. $17,000. O c. $20,800. o d. $30,800. QUESTION 5 A monopoly firm can sell 180 units of output for $12 per unit. Alternatively, it can sell 181 units of output for $11.98 per unit. The marginal revenue of the 181 unit of output is oa. -$6.98. ob. $6.98. O C. $8.38. od. $11.98.QUESTION 8 50 I 45 4o 35 . 3o 25 225 20 15 10 MC=ATC Demand 50 100 150 200 250 300 350 400 450 500 550 600 I550 700 350 800 Quantity Refer to the Figure. If there are no fixed costs of production, monopoly prot with perfect price discrimination equals M a. $1. nb.$1,562.5. n c_ $3,125. n d.$6,250. QUESTION 9 Which of the following is not a characteristic of a monopoly? H a.barriers to entry M b.one seller M c. one buyer \"2 d.a product without close substitutes QUESTION 10 A monopolist's prots with price discrimination will be r\" a. lower than if the rm charged a single, prot-maximizing price m b_the same as if the fmn charged a single, prot-maximizing price. M c. higher than if the rm charged just one price because the rm will capture more consumer surplus. m d_higher than if the firm charged a single price because the costs of selling the good will be lower