Question: Let |A| = 5. (a) What is |A A|? (b) How many functions f: A A are there? (c) How many closed binary

Let |A| = 5. (a) What is |A × A|? (b) How many functions f: A × A are there? (c) How many closed binary operations are there on A? (d) How many of these closed binary operations are commutative?

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