Estimate daily evaporation from a lake (cm/day) using Penman's (combined) formula, given the following information: average air temperature is 28 oC, average water temperature is 15 oC, average wind speed at 8m height is 20 Km/hr, average relative humidity is 45%, and net radiation is 380 cal/cm2.day. If you need a formula for evaporation due to mass transfer, you may assume Meyer's formula applies to the lake.