Hi just hoping you can assist with my homework :)

The following is a description of the process of booking into a group fitness class at a local gym: The customer calls the service officer at the gym to request a booking for the group fitness class. The service officer checks on the computer to see whether there is space available in the class. If space is available, the service officer asks the customer if they are a regular member or a casual visitor. If they are a regular member, the service officer finds their details in the computer system and books the customer into the class via the booking system on the computer. For casual visitors, the service officer enters the customers name, email, phone number and credit card details into the computer to process the booking. Once the booking is complete, the computer sends the customer an email receipt confirming the date, time and type of class in the booking. Which of the following are entities described in the process above? Tick all that apply: Credit card details Computer Service officer Customer Email receipt