You are hired to develop an online shopping system which supports duties of the system administrator. He can make an account and cancel for visitors, and view the items and perform the check-out from system. To make an account, the visitor should first check if the users email is available, then assign an account if not.The visitor can register by himself , view items and complete his purchase by credit card or any other payment methods. Receptionist can also receive visitors payments, record them in a database and provide receipts. The system manager can make/cancel accounts for visitors, review weekly purchase report, and produce revenue summary. Q1)Identify the actors and the use cases. Briefly, in one sentence, describe each use case (the primary actors goal) but do not elaborate them. Q2) Draw the use case diagram using Rational software Architect Designer Tool. Q3) Draw the sequence diagram using Rational software Architect Designer Tool.