How do we write a set in set- builder method?​

How do i do this? i don’t understand

What adds to be the bottom number but also multiplies to be the top number with 8 on the bottom and 15 on top

Which of the following are independent events? a) knowing that it is going to rain tomorrow, and bringing an umbrella to schoolb) knowing that you have to get up early tomorrow, and going to bed before 9 p.mc) knowing that it is going to rain tomorrow, and going to bed before 9 p.md) knowing that you have a test in school tomorrow, and studying thw night before