Q	P	TC
0	$160	$3,000
10	$152	$3,630
20	$144	$3,990
30	$136	$4,170
40	$128	$4,260
50	$120	$4,350
60	$112	$4,530
70	$104	$4,890
80	$96	$5,520
90	$88	$6,510
100	$80	$7,950

a. Determine equations for P=f(Q), MR=f(Q), ATC=f(Q, Q²), AVC=f(Q, Q²), MC=f(Q, Q²). Recall that your marginal equations should be derivatives of your totals!

b. Determine the profit-maximizing price and quantity. (Since MC is in terms of Q², solving with calculus and algebra can be messy unless you know the quadratic formula. Your table should give an exact answer.)

c. How much total profit would your firm earn if you set P and Q according to part b?

d. Describe the competitiveness of the market by calculating the Lerner index.