$1.$ Find the properties of the refrigerant at each state point with using R$-134$a Pressure$-$Enthalpy chart and complete the Table $2.$as follows:

$$ Point $1$: use the measured values of TR$1$ and absolute pressure of the low$-$side $($PLOW$\_$ABS$)$

$$ Point $2$: use the measured values of TR$2$ and absolute pressure of the high$-$side $($PHIGH$\_$ABS$)$

$$ Point $3$: use the measured values of TR$3$ and the pressure of the condensation process $($equivalent to the absolute pressure of the high$-$side $($PHIGH$\_$ABS$))$

$$ Point $4$: use the measured values of vaporisation pressure $($equivalent to the absolute pressure of the low$-$side $($PLOW$\_$ABS$))$ and the constant enthalpy of the expansion process $($hR$3=$hR$4)$