A two$-$liter, four$-$cylinder, open$-$chamber St engine operates at $3500$ RPM using stoichiometric gasoline. At this speed volumetrie efficiency is $93\%,$ combustion efficiency is $98\%,$ indicated thermal efficiency is $47\%,$ and mechanical efficiency is $86\%.$ Calculate: $($a$)$ Brake power. $[$kW$]($b$)$ bmep. $[$kPa$]($c$)$ Amount of unburned fuel exhausted from the engine. $[$kg$/$hr$]($d$)$ bsfe. $[$gm$/$cW$-$hr$]$