1. Suppose processes p0 and p1 share variable V2, processes p1 and p2 share variable V0, and processes p2 and p3 share variable V1. a. Show how the processes can use enableinterrupt() ' and disableinterrupt () to coordinate access to V0,V1, and V2 so that the critical section problem does not occur. b. Show how the processes can use semaphores to coordinate access to V0,V1, and V2 so that the critical section problem does not occur. Q2: Textbook P. 321 -> question 2. Enabling and disabling interrupts to prevent timer interrupts from invoking the scheduler is one way to implement semaphores. This technique can influence I/O because it makes the interrupt handler wait until the interrupts become enabled before the handler can complete an I/O operation. Explain how this could affect the accuracy of the system clock. (10 points)