Draw the most stable configuration of

Explanation

Remark: The bulky t-butyl group is particularly prone to occupy an equatorial position if other substituents are considerably smaller than t-butyl, the molecule is virtually locked in a single conformation. The one with an equatiorial t-butyl group, t-butyl group has been widely used as a holding group to permit the study of physical and chemical properties associated with a purely axial or purely equatorial substituent.