Answer 1

int a = 3;
int b = 6;
int c = 1;
int d = 8;

System.out.println (Math.max(a,Math.max(b,Math.max(c,d))));
//printed the max number.

System.out.println (Math.min(a,Math.min(b,Math.min(c,d))));
//printed the min number