(Solved): The following alkyl bromide shown below in the 3D ball-and-stick representation is the product of a ...

The following alkyl bromide shown below in the 3D ball-and-stick representation is the product of an electrophilic addition reaction of $\mathrm{HBr}$ with three different alkenes. Identify the three alkenes that would selectively generate this cation. In the figure, a gray ball indicates a carbon atom, a white ball indicates a hydrogen atom and a brown ball indicates a bromine.