The following graph shows the demand, marginal revenue, average total cost, average variable cost, and marginal cost curve for a monopolist, Please help me I am really confused and not sure if I am doing this correctly. Thank you please show any calculations!

180 MC 160 ATC Price, 140 costs, 120 and revenue 100 per unit 80 (dollars) 60 40 20 MR D 0 1 2 3 4 5 6 7 8 9 10 11 12 Quantity of output (units per hour) A. What is the profit maximizing/ loss minimizing quantity of output? How do you know? Explain. B. What is the maximum price the monopolist can charge? C. Is this monopolist making economic profit or economic loss? How do you know? Explain D. Show the economic profit/loss on the graph. E. Calculate the firms profit or loss. Show your calculations