Strawberries contain about $22$ wt$\%$ solids and $78$ wt$\%$ water. To make strawberry jam, crushed

strawberries and sugar are mixed in a $50$:$50$ mass ratio, and the mixture is heated to evaporate water until

the residue contains one$-$third water by mass.

$($a$)$ Draw and label a flowchart of this process.

$($b$)$ Do the degree$-$of$-$freedom analysis and show that the system has zero degrees of freedom $($i$.$e$.,$ the

number of unknown process variables equals the number of equations relating them$).$ If you have too

many unknowns, think about what you might have forgotten to do$.$

$($c$)$ Calculate how many pounds of strawberries are needed to make a $50$ pounds of jam.