Could I get some help with this last Organic Chem question please?

Give the structures of possible products for the following reactions:

4. (2 points) Which isomer of pentane has the lowest boiling point? A. Pentane B. 2-Methylbutane D. None, they all have the same boiling point (C.) 2,2-Dimethylpropa 5. (6 points) Give the structures of possible products for the following reactions. a) +Cl2heat b) +Cl2+ light (6 points) Give a balanced reaction for the combustion of propane. (C3H8+SO23CO2+4H2O+heat