Below is a flowsheet for a crystallization process. A hot solution of water and substance A enters the cooler (Stream 1 contains A and water). At the cooler, some of the water is evaporated (Stream 2 contains only water) and the rest (called "slurry") enters the filter (stream 3 contains A and water). At the filter, wet crystals are collected (Stream 4 contains A and water), while the solution of water leaves in stream 5. It is known that:
50 kg of hot solution enter the process with 32 wt% of A.
3 kg of water are evaporated in the cooler.
The final cold solution is 42 kg.
Determine the degrees of freedom in the whole process.