Based on the scenari given below, answer the following questions. Legacy systems are socio-technical computer-based systems that have been developed in the past, often using older or obsolete technology. These systems include not only hardware and software but also legacy processes and procedures old ways of doing things that are difficult to change because they rely on legacy software. Changes to one part ofthe system inevitably involve changes to other components, Legacy systems are often business-critical systems. They are maintained because it is too risky to replace them. For example, for most banks the customer accounting system was one of their earliest systems. Organisational policies and procedures may rely on this system. If the bank were to scrap and replace the customer accounting software (which may run on expensive mainframe hardware) then there would be a serious business risk if the replacement system did not work properly. Furthermore, existing procedures would have to change, and this may upset the people in the organisation and cause difficulties with the bank's auditors. a) Why it is expensive and risky to replace legacy systems with new systems? Explairn (9 marks) any THREE (3) reasons. b) Why legacy systems are expensive to maintain? Explain any FOUR (4) reasons c Discuss any THREE (3) components of legacy system (10 marks) (6 marks) (Total 25 marks)