Practice writing GUI (Graphical User Interface) code using Java FX GUI

Create a mortgage calculator app that allows the user to enter a purchase price, down-payment amount and an interest rate. Based on these values, the app should calculate the loan amount (purchase minus down payment) and display the monthly payments for 10-, 20-, 30-year loans.

Allow the user to select the loan duration (in years) by using a Slider and display the monthly payment for that custom duration.