$\backslash$lambda $\backslash$lambda $($R$($t$))$ for $10$ hours of operation, assuming a failure rate of

$0\mathrm{.}0083$ failure$($s$)/($h$)$our$.$

Which one is right?

A$=60$ hours, MTTR $=2\mathrm{.}5$ hours, $\backslash$lambda $=0\mathrm{.}01667$ failure$($s$)/($h$)$our$,$ Availability $=0\mathrm{.}96,$

Reliability Function for $10$ hours ~~$0\mathrm{.}92$

BMTBF$=80$ hours, MTTR $=3\mathrm{.}5$ hours, $\backslash$lambda $=0\mathrm{.}01$ failure$($s$)/($h$)$our$,$ Availability $=0\mathrm{.}95,$ Reliability

Function for $10$ hours ~~$0\mathrm{.}85$

CMTBF$=100$ hours, MTTR $=1\mathrm{.}5$ hours, $\backslash$lambda $=0\mathrm{.}007$ failure$($s$)/($h$)$our$,$ Availability $=0\mathrm{.}98,$

Reliability Function for $10$ hours ~~$0\mathrm{.}90$

D$=50$ hours, MTTR $=3$ hours, $\backslash$lambda $=0\mathrm{.}009$ failure$($s$)/($h$)$our$,$ Availability $=0\mathrm{.}90,$ Reliability

Function for $10$ hours ~~$0\mathrm{.}93$