100 Days of Java challenges

Write a program which performs the following tasks:

Initialise an ArrayList named weekdays which contains strings from Monday to Sunday
Print all the elements in the ArrayList weekdays
Sort the elements of weekdays alphabetically in increasing order and print them again
Sort the elements of weekdays alphabetically in decreasing order and print them again
Write a function that takes an ArrayList and a charater as parameters and removes all the elements from the arraylist that start with the given character. For example: if the parameters are weekdays and the charater 't', then Tuesday and Thursday should be removed from the arraylist weekdays