a$.$ Define degree of freedom

b$.$ A process for making a single product involves reacting two $!$iquids in a continuously agitated reactor and distilling the resulting mixture. Unused reactants are recovered as overhead and are recycled. The product is obtained in sufficiently pure form as bottoms from the distillation tower.

Prepare a qualitative flowsheet for the process, showing all pieces of equipment.

Discuss the three main uses or a process flowsheet

Explain the importance of a preliminary process flow sheet in process design