Need help on 9-11 and to make sure the graph was calculated correctly. Not sure how to figure out profit/loss

Fixed costs = $50. Variable costs: 0 units, $ 0; 1 unit, $75; 2 units, $125; 3 units, $195; 4 units, $280.

complete the following daily cost schedule for Company A. Total Average Average Average Variable Total Fixed Marginal Variable Fixed Total Quantity Cost Cost Total Cost Cost Cost Cost Cost 0 50 50 1 75 125 50 75 50 175 75 50 125 2 125 3 195 50 245 70 50 87.5 4 50 50 280 330 85 70 50 82.5 If Company A wants to maximize its profits and sells in a purely competitive industry at the price given in the Quiz Question# 9, how many should they produce? Quiz question #10: Calculate Company A's economic profit/loss. Quiz Question #11: Will firms enter or leave this industry or is this industry at long run equilibrium