List the number of each type of atom on the left side of the equation C8H18(l) + 12 O2(g) →8 CO2(g) + 9 H2O(9)

Asuspension of yeast cells is being grown under anaerobic conditions such that glucose is degraded to ethanol and carbon dioxide. if one wishes to follow this process by monitoring the release of 14co2, at which positions in the glucose molecule would the 14c label need to be incorporated?