Electrolysis Molten Metal Halides (Salts)

[sunnyorange]

What substance is produced at the anode during the electrolysis of a mixture of molten calcium bromide and molten magneius iodide?

 

[Astronuc]

What process takes place at the anode, i.e. oxidation or reduction?

http://www.science.uwaterloo.ca/~cchieh/cact/c123/eltlysis.html

Given the choice between CaBr₂ and MgI₂, the decomposition of which would be more spontaneous, or rather which one is thermodynamically easier to achieve?