Write a function called addListNums$()$that accepts a list of numbers. The function should return the sum of the first, third, and last item in the list. You may assume that the list that is passed to that function contains at least $2$ numbers in it$.$ For example, addListNums$([3,4,5,6])$ would return $14($i$.$e$.$ adds the first item in the list, $3,$ to the third item, $5,$ and the last item $6,$ and returns the sum$).$