37. (a) An important aspect of information systems planning is that an organization's strategic plan is the basis for the formulation of the information systems strategic plan. State and explain the contents of an information systems strategic plan. (b) Identify and explain four types of system maintenance. 38. (a) Define the term, "system". (12 mks) (8 mks) (2 mks) (b) Briefly explain three basic components of a system. (6 mks) (c) Outline four properties of a system. (4 mks) (d) Describe the main components of a decision support system (DSS) (8 mks) 39. (a) Explain briefly each of the following information systems terms: (i) Transaction processing systems (3 mks) (ii) (iii) Decision support systems (iv) Management information systems Expert systems (b) Identify two challenges faced in systems maintenance. (3 mks) (3 mks) (3 mks) (2 mks) (c) Describe the features of (i) Deterministic (ii) Stochastic and (iii) Adaptive systems. Give a practical example of each type of system. (6 mks)