$1.$Explain what is an Event? Describe the relationship between an event source object and an event object.

$2.$What is the registration method for a button to register an ActionEvent handler?

$3.$What is a lambda expression? What is the benefit of using lambda expressions for event handling? What is the syntax of a lambda expression?

$4.$What is a functional interface? Why is a functional interface required for a lambda expression?

$5.$What method do you use to get the mouse$-$point position for a mouse event?

$6.$What methods do you use to register a handler for mouse$-$pressed, $-$released, $-$clicked, $-$entered, $-$exited, $-$moved, and $-$dragged events?

$7.$What methods do you use to register handlers for key$-$pressed, key$-$released, and key$-$typed events? In which classes are these methods defined?

$8.$How do you set focus on a node so it can listen for key events?

Answer each question short and simple, thanks!