A refrigerator uses refrigerant$-134$a as the working fluid and operates on an ideal vapor$-$

compression refrigeration cycle with Evaporator Pressure of $0\mathrm{.}14$Mpa and Condenser Pressure of $0\mathrm{.}85$ Mpa and Mass flow rate of $0\mathrm{.}1$ kg$/$s

Determine:

$($a$)$the rate of heat removal from the refrigerated space

$($b$)$the power input to the compressor

$($c$)$ the rate of heat rejection to the environment

$($d$)$the COP of the refrigerator.