For Questions $23$ and $24,$ consider a monopolist facing demand and with costs as illustrated below.

$23.$ First suppose the monopolist must charge all customers the same price $($the marginal revenue curve illustrated above reflects this assumption$).$ To maximize profit, the monopolist will set a price of $$ per unit and sell

A$.$ $$3\mathrm{.}45$;$3,000.$

B$.$ $$5\mathrm{.}40$;$740.$

C$.$ $$6\mathrm{.}65$;$4,580.$

D$.$ $$9\mathrm{.}70$;$3,000.$

$24.$ Now suppose the monopolist can engage in perfect price discrimination. When maximizing profit, the monopolist will sell $q,$ units of output.

A$.740$

B$.3,000$

C$.4,580$

D$.$ None of the above answers are correct $($since the graph does not convey enough information to determine the profit maximizing quantity for such a firm$).$