Two question for you to get sweets!!!

Below gives two questions for you to think about. The first of you who gave correct answer can get a sweet. Each question can be only guessed for 3 times. Please give your answer in the cbox beside. (P.S: Steven and Saiful can not do this question as I told him ready)
First question:
If I told you
0=5,
1=7,
2=11,
3=14,
4=17,
5=?
The question is 5 equals to what?

Second question
Give you four numbers: 5 5 5 1, use multiply, divide, plus and minus let the number be 24 at last. Each number can only be used for one time.
Now is the time for you to think about.
Good wish for you!