A student is given a sample of contaminated rock salt, which consists of sodium chloride mixed with insoluble sand and clay impurities.

To isolate pure, dry crystals of sodium chloride from this mixture, the student must perform three main physical processes:

• filtration
• evaporation to crystallise
• dissolving in water

Place these three processes in the correct order in which they must be carried out from start to finish.

• Stage 1 (First): __________
• Stage 2 (Second): __________
• Stage 3 (Third): __________