A price$-$taking firm has a total cost function given by: TC$=40+9$q$+6$q$?.$ The firm's costsare the same in the short and the long run. The current price is $$7\mathrm{.}00$ and expected to staythere in the long run. What should the firm do$?$Select one:O a$.$ Produce in the short run and continue operating in the long run.O b$.$Cannot be determined given the information.O c$.$Shutdown once the firm reaches the long run but produce output in the short run.O d$.$Shutdown in the short run.