$10\mathrm{.}26$ Figure P$10\mathrm{.}26$ shows a two$-$stage, vapor$-$compression refrigeration system with two evaporators and a direct$-$contact heat exchanger. Saturatet..$-$por ammonia from evaporator $1$ enters compressor $1$ at $18lb\frac{f}{i}n.{?}^2$ and exits at $70lb\frac{f}{i}n.{?}^2$ Evaporator $2$ operates at $70lb\frac{f}{i}n.{?}^2,$ with saturated vapor exiting at state $8$ The condenser pressure is $200lb\frac{f}{i}{n}^2{?}^2,$ and saturated liquid refrigerant exits the condenser. Each compressor stage has an isentropic efficjency of $80\%.$ The refrigeration capacity of each evaporator is shown on the figure. Sketch the $T-$s diagram of the cycle and determine