= 1 2 1 ! = Let the use case below: Buy Product: Visitor browses catalog & selects items to buy Visitor register to the system to purchase products (becomes costumer) Customer goes to check out Customer fills in shipping information (phone number, address, next-day or 3-day delivery) System presents full pricing information Customer fills in credit card information System forward the payment details to the credit card company for validation Credit card company authorizes purchase System confirms sale immediately System sends confirming email and SMS to customer Questions: 1- Identify the different Actors (specify their type) (2 marks)