18. (a) Explain how ESSS help senior managers make better decisions. (6 mks) (b) Describe the capabilities of an ESS. (4 mks) (c) Describe three basic components of a Decision Support System (DSS). (d) Explain the role of info systems in helping people working in a group make decisions more efficiently. (4 mks) (6 mks) 19. (a) Describe the groups responsible for the management of information systems projects. (8 mks) (b) Define the term software project management. (c) Explain any five strategies of risk reduction in information systems projects. (2 mks) (10 mks) 20. (a) Describe the term change management. (b) Explain the term 'risk' when used in project management. (c) Explain three reasons that would make it necessary to perform a project review. (d) Sanglinda has realized that she has failed to meet scheduled goals as a project manager. Explain four factors that could have contributed to this failure.