e$.$ Determine the composition of $P.$

$2.$ Can you solve these thre material balanoss for F$,$ D$,$ and $y?$

$0\mathrm{.}1f+0\mathrm{.}3D=0\mathrm{.}2P$

$0\mathrm{.}9F+0\mathrm{.}7D=0\mathrm{.}8P$

$F+D=P$

How many values of the concentrations and flow rath in the process shown in Figure SAT$3\mathrm{.}2$P$3$ are unknown? List them. The streams contain two components