(a) Attack patterns describe the techniques that attackers may use to find bugs or errors in software system. The attack patterns can be broadly grouped into four categories namely dependency attacks, user input attacks, design attacks and implementation attacks. Explain each of the categories and provide two (2) examples for each category [10 Marks] (b) Elobrate two (2) main evolution of technologies and information systems since your first encounter with computers. Based on these changes identify three (3) shifts in technologies and their use that brought about concerns for software security