Decoder

Imagine that the algorithm the IRS uses to determine who to audit is based on
your social security number. The way it works is they start adding up the
digits of the social security number to get partial sums (9 partial sums in
all). Then they add up all the partial sums, and if that number is divisible by
11, you get audited. Here's an example:

SS#: 041252467
partial sums: 0, 4, 5, 7, 12, 14, 18, 24, 31
sum of partial sums: 115

In this case, you would be spared from the IRS. Create a class Decoder than
contains the method audit() that, given a social security number, returns a
boolean indicating whether a person with that number would be audited. The
input to audit() will be a String representing the social security number
(excluding dashes) that consists of 9 integers (we'll do the data checking).
Here is the method signature:

// Precondition: This method takes a String input which must contain 9 exactly
integers.
// Postcondition: Returns a boolean indicating whether the string input would
case this person to be audited.

public boolean audit(String ssn);