Refrigerant $134$a enters a horizontal pipe operating at steady state at $40$ C$,300$ kPa. The pipe diameter is $0\mathrm{.}01$ m$.$ Determine: $($a$)$ the mass flow rate of the refrigerant, in kg$/$s$,($b$)$ the velocity at the exit, in m$/$s$,$ and $($c$)$ the rate of heat transfer between the pipe and it's surroundings, in kW$.$