Write a method called averageVowels that takes an ArrayList of strings as a parameter and returns the average number of vowel characters in all Strings in the list (you will need to count all the vowels and divide by the number of strings). If your method is passed an empty ArrayList, it should return 0.0.

java Create a static method that: is called repeatAll returns ArrayList of Booleans takes in a single parameter - an ArrayList of Booleans This method should modify its ArrayList parameter by repeating its ArrayList values. For example, if the parameter is   (true, false, false) The modified ArrayList should be   (true, false, false, true, false, false)    public static void main(String[] args) {    Scanner in = new Scanner(System.in);    int size = in.nextInt();    ArrayList<Boolean> list = new ArrayList<>();    for(int i=0; i < size; i++) {      list.add(in.nextBoolean());    }     System.out.println(repeatAll(list));   }  }

Write a method that computes how often each letter A-Z or a-z occurs in a string. Don't distinguish between upper- and lowercase letters. Return an array of length 26. The ith element contains the number of times that the letter 'a' + i or 'A' + i occurs in the string. The string may contain other characters that you should simply skip.

Define a collection “ArrayList” to store the students' names. Use a loop to take 5 students’ names from the user and store them in the collection. Add two student names to the collection and remove the last name in the list. Insert a student name in third place in the collection. Sort the names alphabetically. Ask the user to enter a student name and search for it in the collection and prints the result as “Found” or “Not Found”. Print the whole collection using the enhanced for loop.   (java)