Extraction of aluminium from bauxite

Following flow diagram represent the extraction of aluminium form bauxite. The purpose of adding cryolite is :

Which of the following reagent is used in the extraction of Aluminium form bauxite ?

Write chemical reactions taking place in the extracion of Aluminium from Bauxite ore .

What is the role of cryolite in the extraction of pure aluminium from bauxite by electrolytic process?

Answer the following question related with the isolation of aluminium from bauxite: The aluminium oxide for the electrolytic extraction of aluminium is obtained by heating aluminium hydroxide. Write the equation for this reaction.

Answer the following question related with the isolation of aluminium from bauxite: Name the element which serves both as the anode and the cathode in the extraction of aluminium.