3 [40%] Recently a large sales company computerised their sales operation to improve their profit and speed up their services. This company has many branches at different locations. The company introduced the network concept to connect the HQ with all branches. They purchased the required hardware and software to implement the computerised system. Now, the company appointed you as an IT specialist to implement the above system in their company. a. State the appropriate change over methods that can be used as part of the systems implementation. (20 marks) b. Discuss the potential strengths of the method you adopted (20 marks)