Java Program to compute and print the average temperatues for the four weeks

Write a class called Statistics, which has a static method called average, which takes a one-
dimensional array for double type, as parameter, and prints the average for the values in the
array. Now write a class with the main method, which creates a two-dimensional array for the
four weeks of a month, containing minimum temperatures for the days of the week(an array of
4 by 7), and uses the average method of the Statistics class to compute and print the average
temperatues for the four weeks.

Program: 

public class q5
{
   public static void main(String args[])
   {
    int i;
    double arr[] = {23, 56, 78, 89, 12, 34, 56};
    //Statistics sc = new Statistics();
    //sc.average(arr);
    //double b = sc.average(arr);

    Statistics.average(arr);

    //System.out.println(b);

    //int [][] arr2 = new int[4][7];

    double arr2[][]={{1,2,3,4,5,6,7}, {23, 56, 78, 89, 12, 34, 56}, {23, 56, 78, 89, 12, 34, 56}, {23, 56, 78, 89, 12, 34, 56}};
    System.out.println("Average temperatures of each week: ");
    for(i=0; i<4; i++)
    {
        Statistics.average(arr2[i]);
    }
   
       
   }
}

class Statistics
{
    static void average(double arr[])
    {
        double sum = 0;
        for(int i =0; i<7; i++)
        {
            sum = sum + arr[i];
        }
        double avg = sum/7;
        //return avg;
        System.out.println(avg);
    }
}