Please solve this coding bat question:

http://codingbat.com/prob/p213367

getMode

Complete the following method to compute the mode(s) (most frequently occurring value). If there are multiple modes, return them all in alphabetical order. If there are no elements in the array, then return an empty array.

getMode(["hello", "bye"]) ? ["bye", "hello"] getMode(["hello", "hello", "bye"]) ? ["hello"] getMode(["hello", "hello", "bye", "bye"]) ? ["bye", "hello"]