[20 points] [SHORT QUESTIONS] a. [5 points] When an interrupt occurs, the CPU (hardware) must be able to perform several operations atomically (i.e., as an indivisible step of operations). List these operations and discuss whey each of them is necessary. b. [5 points] What are fundamental differences between interrupts on the one hand, and exceptions (faults/system calls) on the other hand? c. [5 points] What are similarities between interrupts on the one hand, and exceptions (faults/system calls) on the other hand? d. [5 points) What is common between faults and system calls that let us classify them together as a class of exceptions