Please give some explains! Thank you!

5. Draw arrow and boxes forthe following code Node head new Node(1, null) Noden- new Node(2, null); nnex head-n; t= head; 6. Write the output generated at the indicated lines by the following program. publicclass Mylnt int X, public Mylnt(intx) this.x= x; publicvoid plusPlus) publicstaticvoid main(String args[) Mylnt a, b, c, d; a b new Mylnt (100); c = d = new Myint(99); a.plusPlus); System.out.println(a.x); //line A System.out.println(b.x); //line B System.out.println(c-a); //line C System.out.printin(d = a); //line D (a) Output generated at line A is: (b) Output generated at line B is: (c) Output generated at line C is (d) Output generated at line D is