The following repair times $($i$.$e$.,$ TTRs$)$ for the repair of electric motors have been

logged in:

Using these data, obtain:

$1.[4]$ g$($t$=1\mathrm{.}5)$ repair density

$2.[4]$ G$($t$=1\mathrm{.}5)$ repair distribution

$3.[4]$ m$($t$=1\mathrm{.}5),$ repair rate

$4.[4]$ MTTR

Q$2.[10]$

Compare one$-$out$-$of$-$two trip logic vs$.$ two$-$out$-$of$-$three trip logic for the same process system, and with the same

reliability of each component in the safety system, in terms of reliability and availability of the target process

system.