(iii) A Personal Computer (PC) is integrated with cache memory to increase its performances. In its BIOS setup, the user has the option to enable or to disable the cache. When you enable the cache, the processor accesses main memory through the cache memory. When the cache is disabled, the processor directly accesses the main memory without using the cache memory. It was noticed that the PC took 50 seconds to complete a task when the cache is disabled. When you enable the cache, the same task needs only 10 seconds at similar conditions. Technical documentation of the PC says that the memory access time can be improved ten (10) times when the cache memory is activated. I. II. What is the speedup you gained for the task mentioned above using the cache memory? Find the percentage of the time of the task that can be improved by cache memory. (8 marks)