Saturated moist air at $\backslash (15^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash )$ and standard atmospheric pressure undergoes a process which has a sensible$-$heat ratio of SHR $\backslash (=0\mathrm{.}70\backslash ).$ After the process, the dry$-$bulb temperature is $\backslash (40^\{\backslash$circ$\}\backslash$mathrm$\{$C$\}\backslash ).$ By the psychrometric chart, determine the following at the end of the process:

$($a$)$ humidity ratio,

$($b$)$ dew$-$point temperature,

$($c$)$ relative humidity, and

$($d$)$ wet$-$bulb temperature.