Question 5 Figure 5.1 Jitterbug phones Jitterbug phones are marketed for older adults who wants a cell phone but prefer simple and minimal controls. This particular model provides a single button to call 911 or other preprogrammed number, or call for operators assistance. Jitterbug also provides other phones with additional features. All the phones feature a larger than average numerical display and larger backlit buttons for easy viewing. a) Explain how you would apply any SIX (6) of Donald Norman's design principles in the development of the above mentioned system to maximize user satisfaction. (12 marks) b) Explain in detail any THREE(3) cognitive principles that you have to take into consideration when designing this mobile phone (6 marks) c) List and explain THREE (3) suggestions to improve the usability as well as the functionality of this phone. (7 marks) Question 5 Figure 5.1 Jitterbug phones Jitterbug phones are marketed for older adults who wants a cell phone but prefer simple and minimal controls. This particular model provides a single button to call 911 or other preprogrammed number, or call for operators assistance. Jitterbug also provides other phones with additional features. All the phones feature a larger than average numerical display and larger backlit buttons for easy viewing. a) Explain how you would apply any SIX (6) of Donald Norman's design principles in the development of the above mentioned system to maximize user satisfaction. (12 marks) b) Explain in detail any THREE(3) cognitive principles that you have to take into consideration when designing this mobile phone (6 marks) c) List and explain THREE (3) suggestions to improve the usability as well as the functionality of this phone. (7 marks)