Application of Perfect Competition decision making process to max profits

You have been hired as a consultant to make recommendations to the 4 firms listed below. Each of the competitors wants to maximize profits. Each row represents a separate firm. Apply the rules of marginal analysis to help you advise each of the firms separately. For example should they increase or decrease output, do nothing, or shut down.

Explain your rationale for each firm (why you made the recommendations you listed)

Perfect Competition firms:

Price	Q	TR	TC	P/L	TVC	ATC	AVC	MC
4	100	400	350	+50	300	3.5	3	5
10	20	200	500	-300	300	25	15	10
50	100	5000	5100	-100	3000	51	30	90
25	100	2500	2500	0	2000	25	20	25