A laboratory analysis of a sample finds it is composed of 38.8% carbon, 16.2% hydrogen, and 45.1% nitrogen. What is its empirical formula? Give your answer in the form Cx ​Hy ​Nz.

a) C10H 6N 3
​b) C 4H 8N 2
​c) C5H 10N 3
​d) C3H 7N 2