Write a method, contains, that returns true if the partially filled array (see note) contains the specified key somewhere within the part of the data that is in use. size will always be at least 0 and at most the length of the array. NOTE: In a "partially filled" array, the variable size indicates how many of the elements in that array (beginning at index 0) actually are "in use". For example, given the array {4, 7, 2, 5, 1, 4, 8} and a size of 3 then only the first 3 elements in that array (4, 7, and 2) are actually considered "in use".