In a paper-drying process, the paper moves on a conveyor belt at 0.2 m/s, while dry air from an array of slot jets (Figure 7.16) impinges normal to its surface. The nozzle width and pitch are W = 10 mm and S = 100 mm, respectively, and the nozzle-to-plate separation is H = 200 mm. The wet paper is of width L = 1 m and is maintained at 300 K, while the air exits the nozzles at a temperature of 300 K and a velocity of 20 m/s. In kg/s. m₂, what is the average drying rate per unit surface area of the paper?