Study of Human Computer Interaction demonstrates knowledge on design guidelines, interaction assessment and system usability. The answers to questions (a) to (c) below must be supported be one(1) user real life experience. a) Examine any four (4) Shneiderman's general guidelines for HCl design and indicate how designers can use those rules. b) According to Donald Norman interaction between human and computers can be assessed by using his seven (7) principles. Inspect any four(4) out of seven(7) of those principles and indicate how the designer can exploit them