Compute the right answer of the given problems

Problem 1- Determine the CO₂ emission index for octane (C₈H₁₈) and methane (CH₄), when burned at stoichiometric conditions (phi = 1.0). The molecular weight of octane is 114.23 g/mol, the molecular weight of methane is 16.04 g/mol, and the molecular weight of carbon dioxide is 44.01 g/mol.

Problem 2- Assume that gasoline is burned with 99% efficiency in a car engine, with 1% remaining unburned in the exhaust gases as VOCs. If the engine exhausts 16 kg of gases (MW = 30) for each kg of gasoline (MW = 100).

Part 1- Calculate the fraction of VOCs in the exhaust. Give your answer in parts per million.

I want assistance to find the carbon dioxide emission index.