arrays and using a for loop function

Question

Calculate the sum of the values in the marks array.

Calculate the mean average value and assign that to the average variable.

 

using System;

namespace HelloWorld
{
class Program
{
static void Main(string[] args)
{
int sum = 0;
int[] marks = { 24, 10, 26, 20 };

foreach(int mark in marks)
{


}

Console.WriteLine(sum);
}
}
}