Three$-$month call options with strike prices $$35$ and $$40$ have premiums $$6\mathrm{.}13$ and $$2\mathrm{.}78,$

respectively. r $=8\mathrm{.}33\%$ annual effective.

$($a$)$ Draw the profit, and time diagram of the bear spread.

$($b$)$ What is the maximum gain?

$($c$)$ What is the maximum loss?