A two$-$stage separations unit is shown below.

a$)$ In one table, perform the degree of freedom analysis for all the systems. $[15$ pts$]$

b$)$ Propose a complete strategy to solve the systems. $[15$ pts$]$

c$)$ Calculate all the flowrates. $[20$ pts$]$

d$)$ Calculate the composition of stream F$2.[10$ pts$]$