Lake Ontario is located between the state of New York and Ontario. On a spring day southeasterly winds are advecting air across Lake Ontario from Rochester, NY to Toronto, ON. The atmospheric pressure across the region is 1030 mb and air density is 1.22 kg m-3. a) The temperature at the shore of Lake Ontario in Rochester is 18.5 degrees C. and the relative humidity is 72%. Determine the actual vapour pressure in Rochester