Write a method that returns the "checksum" of a given string. One way to store information about passwords without actually storing the password is to store a variety of characteristics about the password. One characteristic is the checksum. This is the sum of all the ASCII or UNICODE values of each character in the string. For example, the string "A" has a checksum of 65, because that is the ASCII value of "A". As a precondition, you may assume that the input parameter strings will only consist of characters who's ASCII values are the same as their UNICODE values (normal keyboard characters). This does NOT require ANY conditional statements such as 'if' or 'case' (but does require a condition in a for-loop). Note that chars are automatically converted to their ASCII values when stored in an integer variable.