Dry saturated steam $(100C)$ is injected at the rate of $1\mathrm{.}2k\frac{g}{m}in$ into air stream $($dry bulb temperature is $25C$ and wet bulb temperature is $12C)$ flowing at the rate of $200\frac{m^3}{m}in$ through a duct. Determine:

$($a$)$ Specific humidity

$($b$)$ Specific enthalpy

$($c$)$ Dry bulb temperature

$($d$)$ Wet bulb temperature

$($e$)$ Relative humidity