Based on the following Java code, answer the questions $(20$ points$)$: a$)$ Write code in the following section to demonstrate how to implement static polymorphic and dynamic polymorphic variables. b$)$ Based on your code decide: temp: static polymorphic variable OR dynamic polymorphic variable year: static polymorphic variable OR dynamic polymorphic variable class Sample$\{($public void outpoutInf $()\{$ System.out.println $("$Super class"$)$; $\}\}$ class Demo extends Sample $\{$ public void outputInf $()$ System.out.println $("$ Sub class $")$ ; $\}\}$class Test $\{$ public static void main $($ String $[]$ args $)\{$Sample temp;Demo year ; $//$ write the code to demonstrate how to implement dynamic polymorphic variable $//$ write the code to demonstrate how to implement static polymorphic variable