A 60.0 kg mountain climber makes a vertical climb of 2000. m in 5.90 h. From a chemical analysis of the urine samples collected during the climb, it is found that 2.00 × 10-2 kg of water-free protein is catabolized. Assuming a 25.0% muscle energy conversion efficiency, find
a. The percentage of the total energy need for the climb that came from protein and the percentage that came from fat.
b. The mass of natural (wet) fat catabolized (i.e., consumed) during the climb.