public class Arvutused{
   public static double summa(double[] m){
      double abi=0;
      for(double arv: m){
        abi+=arv; //Liidab abile arvu juurde
      }
      return abi;
   }
   public static double keskmine(double[] m){
      return summa(m)/m.length;
   }
   public static double keskmine(double arv1, double arv2){
      return (arv1+arv2)/2;
   } 
   public static void main(String[] a){
      double[] arvud={2, 4, 5};
      System.out.println(keskmine(3, 4));
      System.out.println(summa(arvud));
      System.out.println(keskmine(arvud));
   }
}