A wet solid is dried with air at $70\backslash$deg C and using a humid air. The humid air is pre$-$processed in a pre$-$conditioner where the humid at $20\%$ saturation at $70\backslash$deg C is brought to $10\%$ saturation isothermally. The preconditioned air flows parallel to the flat, wet surface of the solid at a velocity $($v$)$ of $100$ cm$/$s$.$ Under these conditions the heat transfer coefficient is given by h $=14\mathrm{.}3($p$),$ where p is the density of moist air in kg moist air per unit volume moist air. The surface area available for heat exchange with air is $1$ m and the heat of evaporation of the water is $2\mathrm{.}4510\%$ J$/$kg$.($a$)$ Calculate the total amount of water removed in the pre$-$conditioner $(15$ marks$)($b$)$ Calculate the amount water evaporating in the dryer