The characteristic odor of pineapple is due to ethyl butyrate, a compound containing carbon,

The characteristic odor of pineapple is due to ethyl butyrate, a compound containing carbon, hydrogen, and oxygen. Combustion of 2.78 mg of ethyl butyrate produces 6.32 mg of CO2 and 2.58 mg of H2O What is the empirical formula of the compound?