A computer has three main modules which have individual reliabilities of .80,.90,and .90.Because of recent failures,management is now considering adding redundancy.Determine the reliability of the system with backups under these conditions:
(i)Each module has a backup with reliability equal to its own and a backup switch with a reliability of 1.00.
(ii)The backup consists of an identical computer which operates as a whole rather than backing up individual sections.The single switch for the backup computer has a reliability of .96.
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