A room contains air at $1 \mathrm{atm}, 82^{\circ} \mathrm{F}$, and 70 percent relative humidity. Using the psychrometric chart, determine $(a)$ the specific humidity, $(b)$ the enthalpy (in $\mathrm{Btu} / \mathrm{lbm}$ dry air) $(c)$ the wet-bulb temperature, $(d)$ the dew-point temperature, and $(e)$ the specific volume of the air (in $\mathrm{ft}^{3} / \mathrm{lbm}$ dry air).