c# - How can I return the sum and average of an int array?

Question

I need to define two methods for returning the sum and average of an int array. The method defining is as follow:-

public int Sum(params int[] customerssalary)
{
           
         // I tried the following but it fails   return customerssalary.sum();
}

Another question is, how can I return the average of these int values?

Answer 1

customerssalary.Average();
customerssalary.Sum();