R$-12$ flows through a real vapor$-$compression refrigerator at $0\mathrm{.}07$ kg$/$s$.$ It flows into the compressor at $190$ kPa and $-5$C and leaves it at $1$ MPa and $60.$ The refrigerant enters the valve as saturated liquid at $0\mathrm{.}95$ MP and flows out of the evaporator at $200$ kPa and $-10$C$.$ If the mechanical efficiency of the compressor is $75\%,$ find the refrigeration capacity Qr and the coefficient of performance of this cycle.

the answers are QL$=7\mathrm{.}67$ kW & B$=2\mathrm{.}63,$ how do i get to these answers.