Please Can you Help me with my Math Homework, for me its dificult ?

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please help me with this exercises.... PLEASE ONLY THE ANSWER

1. There are 100 people on a line. Andy is the 37th person.
and Ali is the 67th person.
If a person on line is chosen at randon. what is the probability that the person is standing between Andy and Ali?

2. How many ways are there to rearrange the letters in the word elation. if the first and last letter must each be a vowel?

3. How many four- digit numbers have only even digits?

4. A number is a palindrome if it reads exactly the same from right to left as it does from left to right. For example. 77, 959 and 24742 are all palidromes. If a three digit number is chosen at randon, what is the probability that is a palindrome?

5. In a group of 100 students. more students are on a team than are members of a club. If 70 are in clubs and 20 are neither on a team nor in a club, what is the minimum number of students who could be both on a team and in a club.

thanks but I need True Answers Ok....