Array and method overload, the hardest problem

Question

Create a console-based application whose Main() method
declares an array of eight integers. Call a method to interactively
fi ll the array with any number of values up to
eight. Call a second method that accepts out parameters
for the arithmetic average and the sum of the values in the
array. Display the array values, the number of entered elements,
and their average and sum in the Main() method.

I am honestly not even sure what to do here..