Draw Newman projections of the two conformers of cis-1,3-dimethylcyclohexane

a. Draw Newman projections of the two conformers of cis-1,3-dimethylcyclohexane.
b. Which of the conformers predominates at equilibrium?
c. Draw Newman projections of the two conformers of the trans isomer.
d. Which of the conformers predominates at equilibrium?