A dry-bulb temperature of 30°C and a wet-bulb temperature of 29°C were recorded at a weather station. What are the relative humidity and the most likely weather conditions?
(1) Relative humidity is 29% with clear skies.
(2) Relative humidity is 29% with a good chance of snow.
(3) Relative humidity is 93% with clear skies.
(4) Relative humidity is 93% with a good chance of rain.
Pelase write how to determine the right answer?