$($b$)$ A server room is maintained at $20C$ and $50\%RH.$ The outdoor condition is $30C$ DBT and $40\%RH.$ The cooling coil ADP matches the dew point of the room indoor air. If the room only has a sensible heat gain of $2\mathrm{.}4$ kW $,$ estimate the flow rate of conditioned air,

assuming that the cooling coil exit temperature same as ADP and assuming $100\%$ recirculation of indoor air. If$,$ instead of indoor air, $100\%$ outdoor air is cooled to the coil ADP $,$ calculate the increase in the required cooling capacity of the coil. Use a psychrometric

chart and show the relevant process lines.