using System;

public class Program

{

    public static void Main()

    {

        double max=5,min=11,avarege=0,totala=0,totalb=0,x;

        for(int i=1; i<=100;i++)

        { 

            x=double.Parse(Console.ReadLine());

            Console.WriteLine("enter the age for the cheldren:");

            if((x>=5)&&(x<=8.5)) totala++;  

            if((x>8.5)&&(x<=11)) totalb++;

            if(min>x) min=x;

            if(max<x) max=x;

            avarege+=x;

        }

             avarege=avarege/(totala+totalb);

             Console.WriteLine("the avareg is:{0}",avarege);

             Console.WriteLine("the totala and totalb is:{0},{1}",totala,totalb);

             Console.WriteLine("the maximun is:{0},the minimun is{1}",max,min);

    }

}