Create a function, add_arrays(), that does the following:
- first_array, an array of numbers
- needle array, an array of numbers
- output array, which has all values from the first array added to the values from the second array
var first_array = [3,-5,15,4]; var second_array = [3,18,-5,-4]
output = add_arrays(first_array,second_array); console.log(output); //outputs [6,13,10,0];