Using JavaFX, write a simple calculator program that looks something like this: OO Welcome to Calculator 3000 11.0 Functionality 1. The program will display the result of adding two numbers together. 2. The user cannot modify the answer text field 3. The background color of the result text field is red if the result is negative, otherwise the background should be light grey, as shown above and below. O Welcome to Calculator 3000 6 Hitting enter when in either of the operand text fields should also add the numbers together. 4