A. Dual-core processors provide two complete execution cores instead of one, each with an independent interface to the front side bus. Since each core has its own cache, the operating system has sufficient resources to handle intensive tasks in parallel, which provides a noticeable improvement to multitasking. based on this technically explain how the efficiency of an operating system could be improved by implementing dual core microprocessor technology? Justify your answer with the benefits of the dual core technology. (20 Marks) B. Consider the set of 4 processes whose arrival time and burst time are given below: s No. Arrival Time CPU Burst P1 0 5 P2 4 6 P3 6 2 P4 2 2 Calculate the average waiting time if we are applying round-robin scheduling algorithm and the quantum is 2. You are required to provide step by step implementation of the algorithm and provide a Gantt chart (20 Marks)