Prob. 4 (10 pts) A 2-m deep soil profile is comprised of two layers. The upper layer has a thickness of 0.5m. The average volumetric water contents of the upper and lower layers were determined as 1=0.21m3m3 and 2=0.29m3m3. Determine the volume of water (V) that is stored in the profile within a 1-hectare field..