Can someone help me What is the value of the expression below?

14 divided by 2 + 3 (4) minus (6 and one-half minus 3)
10 and one-half
15 and one-half
30 and one-half
36 and one-half

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