$4)$ The potato slices are dried in a fluidized bed drier at a mass flow rate of $2500$ kg$/$h$,$ reducing the moisture level from $78\%$ to $8\%.$ The hot air enters dryer at the level of $"0\mathrm{.}0132$ kg water $/$ kg dry air", leaving the dryer as $"0\mathrm{.}0230$ kg water $/$ kg dry air". Accordingly, calculate the amount of hot air entering the dryer and the amount of dried potato slices produced per hour as "dry air" and "humid air" $(20$ points$).$showing flow chart