CMIS 141 
Due: 31 Aug

Write an applet program to assist the citizens of Ruritania with their
taxes.

The program requests the user's taxpayer id (which is just a
string).  Then the user's filing status is prompted for.  Valid
filing statuses are S for single, M for married, and J for
joint.  The program will repeatedly prompt for a filing status
until the user enters a valid one.  Then the gross income is
prompted for and read (money is a float or double type value).
Then the number of exemptions is input by the user, which can be any
number from 0 through 10 (must be error-checked in a loop).

The program then displays the taxpayer ID, the gross income,
the taxable income (which is the gross income minus the standard
deduction of $3000 and minus $1000 per exemption), the tax rate
(see table below), and the tax due (which the taxable income
multiplied by the tax rate). If taxable income is negative, no tax
is due.
The program then asks the user if he/she wants to do another tax
computation, and if the user replies yes the program does the above
again.

These figures and this process are wholly imaginary.  They are not
approved by the IRS.   It's how people do taxes in Ruritania.

Tax rates:
Filing status     Gross Income range        Tax rate
	  S             0-$10000               15%
                        10000-                 22%
	  M             0-8000                 16%
                        8000-                  31%
	  J             0-7000                 17%
	                7000-25000             24%
                        25000-                 33%


Make sure your program is calculating correctly (test it with inputs
whose value you have hand-calculated).  There is a maximum fine of one
trillion Ruritanian oblags for income tax evasion.  And your software
company will have to share in those costs if it is the cause of
erroneous tax reporting.

This is an applet.  It needs only the init method.  Use JOptionPane
for input and output.