1. If three processes reach their critical sections together, what is the total time the processes spend waiting to enter their critical sections if each critical section takes tc seconds? 2. Write a...

1. If three processes reach their critical sections together, what is the total time the processes spend waiting to enter their critical sections if each critical section takes tc seconds?

2. Write a multithreaded program to simulate two automatic teller machines being accessed by different persons on a single shared account. Enhance the program to allow automatic debits to occur.