Library Function Troubleshoot

I am having an issue getting this students function to work. I am pretty new to this subject, and have tried a couple of different approaches above, but still not getting the response we want. I am sure it is something silly I am missing. Can someone take a look?

When passing parameters to a function, you separate two different values with a comma:

function addNumbers(num1, num2){
    return num1 + num2;

console.log(addNumbers(1, 5));
//Returns 6

An array has to be surrounded by brackets […], and each item is separated by a comma:

var numberArray = [1, 2, 3, 4, 5];

To pass the array as a parameter to a function, you keep the brackets in and pass it as you would a number, or a string:

function addNumbers(numberArray, str){
    var addedNumber = 0;
    for(var i = 0; i < numberArray.length; i++){
        addedNumber += numberArray[i];

    return addedNumber;

console.log(addNumbers([1, 2, 3, 4, 5], "This string is the second parameter and will show in the console."));
//Displays the string parameter in the console
//then returns 15

In short - you’re just missing some brackets, I apologize if I made this a bit too long!