1. )Using the Waterfall development life cycle model, explain the steps you would take to develop a point-of-sale (POS) software for a supermarket in your neighbourhood. (8 marks)

b.) In designing the point-of-sale (POS) software for the supermarket, you want to ensure the design is user-centred. Describe three basic principles you would use to ensure you achieve a user-centred design with respect to the POS software. (6 marks)

c.)Your friend has an issue of being very forgetful. Due to this, whenever he uses the computer simulation program you designed, you need to teach him all over how to use it, which is frustrating to both of you. Explain three approaches you can use to modify your programs interface to accommodate your friends memory limitations when using your program and reduce your frustrations. (10 marks)