Question $4$:

a$.$ Estimate the quantity of water removed when air at $50$@$C$ of $10\%$ relative humidity is blown through a continuous dryer which contains the wet material obtained from a filtration operation if the air exits at a temperature of $35$@$C.$

$($Hint: Please refer to the practice problems and the stoichiometric chart attached$)$

b$.$ The moisture content $($mass $\%)$ of the wet material described in part $($a$)$ at a feed rate of $1\frac{t}{h}$ is to be decreased from $6\%$ to $2\%.$ Calculate the required air flow rate and express your answer in appropriate units.