$4.-5,600$ kg$/$h of a hot saline solution with a concentration of $50\%$ by weight of salt are fed to a crystallizer. Upon cooling, the salt crystallizes, separating into a cold solution saturated with $20\%$ by weight of salt and wet salt with $5\%$ by weight of water.

a$)$Draw and label the flow chart for this process.

b$)$Determine the crystallizer output flows.