Consider a mass of air at 18 ºC, which is located at 1,000 m. above mean sea level. A strong wind moves the air mass over a mountain range at 2,500 m. mean sea level and then the air descends to an elevation of 500 m on the leeward of the mountain. Calculate the air mass temperature at the 1,500 m. and 1,000 m. elevation levels on the leeward side of the mountain. Assume that as the air ascends to the 2,000 m. level, it saturates and precipitates and that the average pseudo-adiabatic or moist air lapse rate is 55% of the dry adiabatic lapse rate. Assume the dry adiabatic lapse rate is 10 degrees C/km.