permutations

A solution $M^1$ containing $18\%KCl,3\%K_{2}S{O}_4$ and $79\%$ water is fed to the process shown below at the rate of $150k\frac{g}{h}r.$ The compositions of the streams are as follows in mass percent.

The process conditions are:

Permutation $1$:

Evaporator product $(M^5)$:$KCl-17\%,K_{2}S{O}_4-22\%,H_{2}O-61\%.$

Recycle $(M^7)KCl-20\%.$

$M^3=100\%KCl$

$M^4=100\%H_{2}O$

$M^6=100\%K_{2}S{O}_4$