Assignment:
Prove Theorem : let F be a social welfare function satisfying the unanimity property. Then for every a, b ∈ A the coalition N is decisive for a over b, and the empty coalition ∅ is not decisive for a over b.
Theorem: Let F be a social welfare function satisfying the unanimity property. For every a, b ∈ A, the coalition N is decisive for a over b and the empty coalition ∅ is not decisive for a over b.
Provide complete and step by step solution for the question and show calculations and use formulas.