solve in 60 mins thanks

1.29b,d. Steady-state molecular diffusion in gases Water evaporating from a pond at 298 K does so by molecular diffusion across an air film 1.5 mm thick. If the relative humidity of the air at the outer edge of the film is 20% and the total pressure is 1 bar, estimate the drop in the water level per day, assuming that conditions in the film remain constant. The vapor pressure of water as a function of temperature can be accurately estimat- ed from the Wagner equation (Reid et al., 1987)