It is 33.7�C at sea level on the coastline of Maui.?

It is 33.7�C at sea level on the coastline of Maui. You are going to travel to the summit of the Haleakala volcano at 4100 meters. The environmental lapse rate from sea level to 1200 meters is 11.3�C/1000m. The environmental lapse rate from 1200 meters to 1900 meters is 8.6�C/1000m. The environmental lapse rate from 1900 meters to 3300 meters is 14.2�C/1000m. The normal lapse rate exists above 3300 meters. What is the temperature at the summit of the volcano?