Assume that three industrial processes (A, B and C) are independent. If the probability of successfully working for 8 hours is .99 for process A, .95 for process B, and .80 for process C, then:
a. What is the probability that all three work successfully for 8 hours?
b. What is the probability that all three fail to work successfully in these 8 hours?
c. What is the probablity that one or more successfully works for 8 hours?
d. What is the probability that one or more fails to work successfully for 8 hours?