QUESTION 9 A production line has three machines A, B, and C, with reliabilities of 99, 96, and 93, respectively. The machines are arranged so that if one breaks down, the others must shut down. Engineers are weighing two altemative designs for increasing the line's reliability. Plan 1 involves adding an identical backup line, and plan 2 involves providing a backup for each machine. In either case, three machines (A, B, and C) would be used with reliabilities equal to the original three. What is the system reliability of Plan 17 (Please keep 4 digits after the decimal point.) QUESTION 10 A production line has three machines A, B, and C, with reliabilities of .99, .96, and 93, respectively. The machines are arranged so that if one breaks down, the others must shut down. Engineers are weighing two altemative designs for increasing the line's reliability. Plan 1 involves adding an identical backup line, and plan 2 involves providing a backup for each machine. In either case, three machinps (A, B, and C) would be used with reliabilities equal to the original three. What is the system reliability of Plan 2? (Please keep 4 digits after the decimal point.)