how do i solve for part b?

A production line has three machines A,8, and C, with reliabilities of 97,92 and .82 respectively The machines are arranged so that if one breaks down, the others must shut down. Engineers are weighing two aiternative designs for increauing the lines relability. Plan 1 involves adding an identical backup line, and plan 2 ivolves providing a backup foc each machine in eather case, three machines (A. B, and C) would be used with reliabilities equal to the original three a. Compute overail system reliability under Plan 1 (Round your intermediate calculations and final onswer to 4 decimel places) Answer is complete and correct. b. Compute overafl system reliabilty under Plan 2 (Round your intermediate calculations and finol answer to 4 decimal places.) Q Answer is complete but not entirely correct. c. Which plan will provide the higher teliability? Plan 1 Plan 20