a B. State whether each of the following is a function or not. Give a reason for your answer. 1. The rule which assigns to each person his/her Taxpayer's Identification Number, 2. The rule which assigns to each month its corresponding number of days. 3. The rule which assigns to each person his/her friend. 4. The rule which assigns to each polygon its corresponding number of Diagonals. 5. The rule which assigns to each perfect square its square root.​