Jazz Nights is a famous Jazz festival, held in Zurich every year. Since its first edition in 1986, it has gone through several major changes regarding its structure, length, and location, but the tickets have always been sold traditionally: through two events agencies. The organizers decided to modernize the tickets selling system completely and created the following concept.

From this year on, the tickets will be sold in three distinct ways: traditionally, i.e., by the two events agencies, in electronic format directly on the festival website, and through SBB. All parties will have access to the same unique tickets database of the new system to avoid double selling. Furthermore, a partnership with the SBB railway company needs to be set up. SBB can sell combi-tickets, including both the festival admission fee and the train ride to the festival venue at a reduced price, from anywhere in Switzerland. This way, more music fans would have easier and cheaper access to Jazz Nights.

Moreover, the system will have to be extended to support German and English, French and Italian. Since tickets will also be sold online, Secure Payment Inc. will be contracted to provide and ensure the security of the online payment service. The Jazz Nights event manager will take care of and negotiate all these details with the involved parties. Additionally, upon arrival at the festival venue, each participant has to self-check-in at a touch screen terminal, which scans the barcodes on his/her ticket and issues a bracelet with an electronic chip. This can be used to load money, such that whenever (s)he wants to purchase snacks or beverages, (s)he does not have to use cash anymore, thus reducing waiting times. This measure was initiated by the program manager and will be deployed by Wrist Solutions Inc. Lastly, according to the cantonal laws, the way the payment transactions are performed has to be audited by an external company at the end of the festival since this is a public event, where the municipality of Zurich is also involved - allowing free use of the public space.

You need to answer the following questions.Explain with steps  

a) Suggest a suitable process model for the above system, justify your answer with logical reasons.

b)Identify Users and functionality of the above system.

c) Draw 3-tier architecture of the system.