阅读短文，回答问题。
Hi, Jack, we're going to have our school sports meeting on the playground next week. It will last three days
from Thursday to Saturday. We have many competitions in running, such as 100-meter race, 400-meter race
and the relay race. We also have the long jump, the high jump, and so on. I know you're good at running. Would
you please take part in the boy's 400-meter relay race which starts at 10:30 am on Friday? Please be on time,
wear your sports shoes and take a bottle of water.
Good luck to you!
Yours,
Jim
1. What does Jim ask Jack to do and why?
2. When does the boy's 400-meter relay race begin?
3. How long does the sports meeting last?