Yes, the playwright job is done once the play is officially finished.
I play piano, and I honestly think that if you can consistently practice and get a good foundation, you can become a decently good player. If you have a music room or music department in your school, you can ask to borrow their piano and go their in your free time. Or, you can ask your family again or come up with the money itself. Good luck on your piano journey :)
Half step because the is no note in between them.
Violet is in design since in design, most designers use the use of using their own drawing design or perspective. With the use of computer- aided technology it makes it useful for designing for animation or the use of different shapes and sizes.
Hope that answers your question!