Write code to the following questions:

1) Given an array of integers, return the sum of all the elements.

2) Given an array of integers, return a new array with the elements in reverse order so {1, 2, 3} becomes {3, 2, 1}.

3) Given an array of integers, return the median of the elements from the original array.

4) Given an array of integers, return the Quartile 1 and Quartile 3 values. (Quartile 1 is the median of the lower half, Quartile 3 is the median of the upper half).

5) Given an array of Strings, return the longest word.