Assignment 2 is a group assessment. Each group should consist of 4 to 6 students. This assignment refers to the case study Simply Tasty (ST) Restaurant provided to you on Moodle. Please note that ALL submissions will be checked by a computerized copy detection system and it is extremely easy for teaching staff to identify copied or otherwise plagiarised work. Copying (plagiarism) can incur penalties, ranging from deduction of marks to failing the course or even exclusion from the University. Please ensure you are familiar with the Academic Misconduct Procedures. Required Tasks Note that all the following 4 tasks refer to the new system to be developed; not the existing system. Task 1: Cost/benefit Analysis (15 marks) Perform and discuss your cost/benefit Analysis. More specifically, you need to calculate the Net Present Value (NPV) and the Payback Period of the project. Based on the calculation results, do you think that the project should proceed? (10 marks) Provide an Excel spreadsheet showing all the calculations of the cost/benefit analysis. Note that all calculations must be done using the formulae embedded in the Excel spreadsheet. (5 marks) In Task 1, you need to submit your Excel spreadsheet as a separate file in addition to your report (in MS Word or in pdf format). Also, copy-and-paste the data and calculations in your Excel spreadsheet into your report (in addition to the submitted Excel spreadsheet). Task 2: Identify all the critical (or core) use cases. Draw a use case diagram to show all these critical use cases. Also, for each such use case, prepare a use case formal description. (15 marks) Task 3: Draw the context diagram and the level-1 data flow diagram (the one that is immediately below the context diagram). (10 marks) Task 4: Develop a prototype of website design (showing the main webpages) you have developed. (10 marks) *** Note: You dont need to actually implement (i.e., writing computer programs) the new system ***