$2\mathrm{.}5$ Refer to Figure $2\mathrm{.}9($c$).$ Determine the overall network reliability if the individual reliabilities of the subsystems are as follows: Subassembly A $=0\mathrm{.}95$ Subassembly B $=0\mathrm{.}97$ Subassembly C $=0\mathrm{.}92$ Subassembly D $=0\mathrm{.}94$ Subassembly E $=0\mathrm{.}90$ Subassembly F $=0\mathrm{.}88$