Consider the cost function

C(Q)=1000+0.5Q^2

for RussCo to produce its new Phone. Using that cost function for the Phone, determine the profit-maximizing output, price and profit (or loss) for the RussCo Phone, and discuss its long run implications, under three alternative scenarios:

RussCo Phone has no substitutes and so is a monopolist, and the demand for the RussCo Phone is expected to forever be Q=69-(1/5)P. You must show your work.

C(Q)=400+2.5Q^2