adding a nested if statement

add a nested if statement such that when the sum of i and j is greater than twenty if i and j are also within 3 units of each other exclusive append result2 to the output.

 

using System;

namespace HelloWorld
{
class Program
{
static void Main(string[] args)
{
int i = 10; int j = 5;
const string result1 = "Rock";
const string result2 = "Paper";
string output = "";

if(i + j > 20)
{
output = result1;

}

Console.WriteLine(output);
}
}
}