You ask for a students age at his or her last birthday. Determine the number of outcomes

Question:

You ask for a student’s age at his or her last birthday. Determine the number of outcomes in each event. Then decide whether each event is simple or not. Explain your reasoning.
1. Event C: The student’s age is between 18 and 23, inclusive.
2. Event D: The student’s age is 20.
a. Determine the number of outcomes in the event.
b. Decide whether the event is simple or not. Explain your reasoning.