Draw all possible stereoisomers for each of the following compounds. If no stereoisomers are possible, only draw one structure. (All hydrogen atoms are implied. If a chiral carbon atom is attached to a hydrogen atom, you should not show the hydrogen atom but use either a wedge or dashed bond and two sticks to establish stereochemistry where appropriate.)
(a) 1-bromo-4-chlorocyclohexane
(b) 3-heptene
(c) 2-bromo-4-chloropentane