Hi I am taking a java class and I was given this problem can anyone please help?

1. Write a main function with the following code, execute it, observe the output and explain what is the reason for observing such output?

int [] a, b;

a = new int[10];

a[5] = 0;

b = a;

a[5] = 42;

System.out.println(b[5]);

2. Write a main function with the following code, execute it, observe the output and explain what is the reason for observing such output?

int[] a, b;

a = new int [10];

a[5] = 0;

b = a.clone();

a[5] = 42;

System.out.println(b[5]);

3. Explain the reason for the differences/similarities between outputs of programs (1) and (2) above.

4.

(A) Implement a Point class with x and y coordinates of type integer and setter and getter methods for x and y.

(B) Implement the clone method for Point class.

(C) Write a main method that creates an object of type Point and invokes its clone method.