How does cloud computing address the poor resource utilisation of traditional data centres? (b) [2 marks] What are two key enabling technologies of cloud computing? (c) [4 marks] Consider the following cloud stack. Three representative cloud service types are Infrastructure as a Service (IaaS), Platform as a Service (PaaS) and Software as a Service (SaaS). Applications Data Runtime Middleware Operating System Virtualization Servers Storage Networking i) [2 marks] Show which layer(s) users and cloud providers have to manage in the case of laas, respectively. Activate ii) [2 marks] Show which layer(s) users and cloud providers have to manage in the case of PaaS, respectively. Go to Sett