The moisture content of the slip cast product entering the dryer is $18\mathrm{.}1$ wt$\%($wet basis$)$ and the moisture content of the product exiting the dryer is $2\mathrm{.}2$ wt$\%($wet basis$).$ The air used for the drying process is ambient air having a dry$-$bulb temperature of $19\mathrm{.}0\backslash$deg C and a relative humidity of $60\%.$ This air is heated by a

preheater to a relative humidity of $10\%.$ What would be the value of dry$-$bulb temperature and wet$-$bulb temperatyre of air exiting the preheater?