Write a function named find_median that accepts an array of integers as
its parameter and returns the median of the numbers in the array. The median is the
number that will appear in the middle if you arrange the elements in order. Assume
that the array is of odd size (so that one sole element constitutes the median) and that
the numbers in the array are between 0 and 99 inclusive.
For example, the median of [5, 2, 4, 17, 55, 4, 3, 26, 18, 2, 17]
is 5, and the median of [42, 37, 1, 97, 1, 2, 7, 42, 3, 25, 89, 15, 10, 29, 27]
is 25.
