Given the flow sheet below with the information provided and given that $40\%$ of component B in the product of unit $1$ comes from stream $3.$ Answer the following questions:

a$.$ Fill out the degrees of freedom analysis table below.

$\backslash$table$[[,$Unit $1,$mixer,Unit $2,\backslash$table$[[$Unit $1],[$Mixer$]],\backslash$table$[[$Unit $2],[$Mixer$]],\backslash$table$[[$Overall$],[$process$]]],[$Number of variables,,,,,,$],[$Number of given variables,,,,,,$],[\backslash$table$[[$Number of independent$],[$equations$]],,,,,,],[\backslash$table$[[$Number of additional$],[$relations$]],,,,,,],[$Degree of Freedom,,,,,,$]]$

b$.$ Based on the results of part a$,$ is the flow sheet solvable using the given information? If the answer is no$,$ assume $x_{A7}=0\mathrm{.}2.$

c$.$ What is your strategy for solution, i$.$e$.$ the sequence of solution $($which unit will be solved first, then which follows and so on until all the variables are calculated$)$

d$.$ Calculate all unknown variables $($flow rates and compositions$).$