Create a UML Diagram, Activity Diagram and a Sequence Diagram For My Project1

Project Description: Create a UML DIAGRAM, Sequence diagram and Activity diagram. Need it to be completed urgently. Create these three diagrams for a GYM business which does not have a web based system yet and will eventually be getting one (which i am creating) for them. Then diagrams in which a web system Has been created for them and the diagrams adjusted accodingly such as online you would be able to book equipment, rooms, trainers, sign up, newsletters etc...