Halogenation of Alkanes

The following hydrocarbons may be chlorinated or brominated by photochemical reaction with the appropriate halogen (chlorine or bromine). Select one of the reactants by clicking the button underneath its formula, and then deduce the number of monochlorinated, dichlorinated and monobromo-monochloro constitutional isomers that could be produced on reaction with one to three equivalents of halogen. You should draw possible structural formulas on a piece of paper before entering your answers.
Do not count stereoisomers.