$4.$ Tax Calculator

$$ Write a GUI application named TaxCalculator that calculates tax

amount. The window title should be "Tax Calculator", and the window

size should have a width of $300$ pixels and a height of $100$ pixels.

Additionally, the application should terminate when the window is

closed.

$$ The application should have the following components:

$$ A label informing the user to enter an amount in dollars.

$$ A text field, with a width of $10$ columns, to accept the user's input in

dollars.

$$ A button with the caption $$Calculate$$ to initiate the tax calculation.

Once the button is clicked, a window $($message dialog$)$ should pop up

to display the result.

$$ Use the following formula for the calculation:

tax $=$ amount $*$ TAX$\_$RATE

where TAX$\_$RATE $=0\mathrm{.}0825$

$$ You may assume that the user will enter only non$-$negative numbers

in the text field. The user will click the button only after entering a

number in the text field.

$$ There are no requirements regarding the number of methods that

can be created.