The accompanying graph shows how air temperature and relative humidity change on a typical summer day in the Midwest. a. Assuming that the dew-point temperature remained constant, what would be the...

The accompanying graph shows how air temperature and relative humidity change on a typical summer day in the Midwest.

a. Assuming that the dew-point temperature remained constant, what would be the best time of day to water a lawn to minimize evaporation of the water sprayed on the grass?

b. Use this graph to explain why dew almost always forms early in the morning.