please, I want solutions to questions c and d

QUESTION 2 [50 MARKS] You have been asked to design an application for the next generation of mobile phones. The precise technology has yet to be decided upon. The aim of the system is to enable users among elderly people to book tickets for sports events and for concerts using their phone. I. Universal design means designing for diversity, including users with special needs disabled users, elderly users and children. For disabled users, suggest how a developer can develop a system to better serve them. (b) (c) [10 Marks] Explains FIVE (5) different techniques that you may use to identify the potential flexibility problems that might arise for people working with this new interface. Give one example for each technique. [15 Marks Help or User Support is crucial because human made products tend to have problems and human have various ability or skill. Assume that you are going to develop a web application system. The system will help the users to manage some process in management. Identify and describe FIVE (5) most suitable user support approach to be implemented [10 Marks/ Usability engineering promotes the use of explicit criteria to judge the success of a product in term of its usability. There are five usability attributes discussed in the Usability Engineering i. Describe and sketch the interface for the software to be developed as per the requirement in Question 2(a). ii. Name and describe FIVE (5) of the attributes. iii. Explain the measuring usability for ALL attribute in (i), [15 Marks! (d)