As a completion of the Unsorted List implementation as array, implement the following two methods: find(e): Search for an element e and return the index of e if exists, otherwise return -1. replace(i, e): Replace the element at index i with element e and return the element at index i. An error condition occurs if i length() - 1.// length() is the number of elements stored in the list.

As a completion of the Unsorted List implementation as array, implement the following two methods: find(e): Search for an element e and return the index of e if exists, otherwise return -1. replace(i, e): Replace the element at index i with element e and return the element at index i. An error condition occurs if i length() - 1.// length() is the number of elements stored in the list