$1.$ Write a program to define the $$Course$$ class that has a name, numberOfSeats, department and numberOfCourses $($which will keep track of how many objects have been created of this class and allow users to get that value$).$ The variable numberOfCourses will be shared by all instances of class, so declare this variable as static.

Have a method to set objects and another method to getNumberOfCourses. Since this method will return a value that is shared by all classes $($which means it is not tied to a specific object$),$ implement this method as static.

Write a test program to do the following:

Create object C$1($CS$155,40,$CS$)$

Invoke getNumberOfCourses$()$

Create object C$2($CS$265,40,$CS$)$

Invoke getNumberOfCourses$()$

Create object C$3($CS$300,25,$CS$)$

Create object C$4($CS$315,30,$CS$)$

Invoke getNumberOfCourses$()$

$2.$ Implement the class $$TestPoint$3$D$.$ Write a test program to read the coordinates of $3$ points $($P$1,$ P$2$ and P$3)$ and prints the distance between P$1$ & P$2$ and then prints the distance between P$1$ & P$3.$ Label your answers. Use Java Application Programming Interface $($API$)$ has a Point$2$D class in the javafx.geometry package for representing a point in a two$-$dimensional plane.