The coagulated remains of a fiendish mutant humanoid creature that evolved on an oxygen-free planet are oxidized and dried in air by a laser beam then processed through a nuclearpowered Orsat analyzer that reports the following composition, using a computerized synthetic voice: "Thee ox-see-gin, car-bon de-oxside and car-bon mo-noxside conzentrations are each exactly seven per-cent. Thee remaining gaz is nitrogen. Zis is very unusual." As chief engineer of the starship Entropy, determine
a. The synthetic formula (CnHm) of the mutant's body tissue.
b. The carbon and hydrogen percentages by mass in the tissue.
c. The percent of excess air available in the atmosphere where the tissue was oxidized.