The Covid$-19$ testing center has a computer which has three modules necessary to work so they can test samples. In order for the computer to function properly, all three modules must function. Two of the modules have reliability's of $\mathrm{.}97,$ and the other has a reliability of $\mathrm{.}99.($component works$)+[$P$($component does not work$)*$ P$($switch works$)*$ P$($backup component works$)]$ A backup computer identical to the one being used will be installed to improve overall reliability Assuming the new computer automatically functions if the main one fails $,$ determine the resulting reliability $.$A $\mathrm{.}995$ B$.\mathrm{.}998$ C$.\mathrm{.}99$ D$.\mathrm{.}867$