The sunny, warm early spring days in Finland are often caused by the so-called About the Fhn effect. There Moist air from the Atlantic rises over the Norwegian mountains, cooling as it rises. The moisture in the air rains on the mountains. When the remaining dry air continues its journey towards Finland, it descends again after the mountains down. The air arriving in Finland is then warm and dry. Explain the following in terms of thermodynamics:

a) Why does the air cool when it rises to the mountains?

'b) Why does it rain in the mountains?

c) Why is the air arriving in Finland warmer than the original air that left the Atlantic?