In the electrolytic refining of a metal M, what would you take as the anode, the cathode and the electrolyte?

Quesiton 8. In the electrolytic refining of a metal M, what would you take as the anode, the cathode and the electrolyte?
Answer: During electrolytic refining, impure metal is made anode and a thin strip of pure metal M is made cathode and the electrolyte used is the soluble salt of Metal M which is to be refined.