The following questions relate to a cyclohexane ring depicted in the chair conformation sh...

The following questions relate to a cyclohexane ring depicted in the chair conformation shown.

(a) Is a methyl group at C-6 that is “down” axial or equatorial?

(b) Is a methyl group that is “up” at C-l more or less stable than a  methyl group that is up at C-4?

(c) Place a methyl group at C-3 in its most stable orientation. Is it up or down?