A clean sand having a permeability of 4.5 x 10-3 cm/s and a void ratio of 0.45 is placed in a horizontal permeability apparatus, as shown in Fig. 7.2. Compute the discharge velocity and the seepage velocity as the head Δh goes from 0 to 80 cm. The cross-sectional area of the horizontal pipe is 95 cm2, and the soil sample is 0.65 m long.?