5. Write a Java class called CountOccurrences. This class defines a method called countOccurrences 0 , which takes as parameters an array of int called a as well as a int called x, and returns an int representing the number of elements of a which are equal to x. 6. Write a Java class called Reverse. This class defines a method called reverseO, which takes as its only parameter an array of int called a, and returns a new array of int which contains all the elements in a, but in the reverse order