Please create a python program that displays an interface that allows a user to generate a simulation of a gravitational slingshot being performed by one large celestial body and one smaller one. It should mimick two bodies in space traveling passed one another.

a$.)$Both masses of the bodies should be customizable by the user.

b$.)$ A traced animation should be made to mark the trajectory of each body.

c$.)$ The angle of approach should be customizable by the user.

Thank you!