Question 4 (30 Points) a) Describe three techniques that you would use to elicit user requirements for a new commercial website selling electrical appliances. (10 POINTS) b) Would you recommend that the website mentioned in (a) above be extended to help users buy from this site using a 3G phone rather than a conventional PC? Justify your answer. [10 POINTS) 9 c) Suppose the company has decided to develop the extended website mentioned in (b) above to provide access via mobile devices. In a short report, describe how you would do a measurement evaluation to assess the usability of a final implementation. [10 POINTS]