(i) If the demand curve is given by q = 24 - 1/4p, then p = 96 - 4q.
The output for which profits are maximized (or losses minimized) is:
MR = MC,
MR = TR'(q) = 96 - 8q,
MC = C'(q) = 6 + q,
96 - 8q = 6 + q,
9q = 90,
q = 10 units,
p = 96 - 4×10 = 56.
Total profits at this price-output combination are:
"TP = TR - C = 56\u00d710 - (100 + 6\u00d710 + 0.5\u00d710^2) = 350."
(ii) If in a separate second market demand is determined by q = 84 - 3/4p, then the monopolist will set different
prices ans different quantities in the two markets, so the total output and profits will increase.
(iii) If the firm still has access to both markets, but is prevented from discriminating between them, then the firm will return to the same price and quantity for both groups.
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