What follows is a Java program excerpt.class Circle$\{$int setVariable$($int s$)\{$ int r; r$=6$;return s$+$r;$\}\}$public class ShowArea$\{$public static void main$($String args$[])\{$Circle cir$=$ new Circle$()$;int a; a$=$ cir.setVariable$(8)$;$\}\}$In the above program,$($i$)$ which variables are static variables?$($ii$)$ Which variables are stack dynamic variables?$($iii$)$ And which variables are explicit$-$heap dynamic variables?