72. (a) Explain three possible causes of an information system project failure. (b) Distinguish the two terms in regard to information systems. (i) Quantitative information (ii) Qualitative information (6 mks) (2 mks) (2 mks) (c) Identify three benefits of a Work Breakdown Structure (WBS) in an IS development project. (d) Explain two circumstances under which an expert system can be applied. (6 mks) (4 mks) 73. (a) Explain the role of information systems in today's competitive business environment. (8 mks) (b) Outline four difficulties that organizations face in the quest of building and sustaining information systems. (4 mks) (c) An effective information system must be able to produce information that carries various characteristics. Explain any three of these characteristics. (3 mks) (c) Explain the term information systems security. (1 mks) (d) Describe three natural hazards that may threaten the security of information systems. (4 mks)