An ammonia refrigeration system has a liquid temp of $28$degree between the regualtor and condenser. Downstream of the regulator, through the evaporator and up to the compressor suction, the NH$3$temperature is $-9$degree $.$Calculate the dryness fraction at the evaporator inlet. Please solve I've been given theory but need to see math to connect dots. a$)23\mathrm{.}6$the $\%$ b$)84\mathrm{.}5\%$ c$)100\%$ d$)37\mathrm{.}2\%$ e$)13\mathrm{.}4\%$