determine the system reliability for the system shown below

r$1=0\mathrm{.}85$ connects to r$2=0\mathrm{.}91,$ r$3=0\mathrm{.}96,$ r$4=0\mathrm{.}89,$r$5=0\mathrm{.}98$

answers;

$0\mathrm{.}489$

$0\mathrm{.}949$

$0\mathrm{.}994$

$0\mathrm{.}849$