Directions: Complete the following questions, for most of the questions the return type and name of the method are left out. Give each method a meaningful name and appropriate return type.

Make a method that gives every other column in a 2D array of Strings a special character. The array and the symbol should be passed in as parameters into the method and the method should not return anything. Assume the columns are of even length.

Create a method called isValidIndex that takes a 2D integer array, a row number, and a column number. It should return true if the row and column number exist in the array, otherwise it should return false. For example, if a 2D array has 3 rows and 3 columns and the if 2 is passed in as a parameter for a row number and 3 for a column number the method should return false because 3 isnt a valid index number in the array.

Write a method that takes a 2D string array as a parameter and prints out the values in the 4 corners in the array.

Write in java