Assume that you have a variety of cyclohexanes substituted in the positions indicated. Identify the substituents as either axial or equatorial.
For example, a 1,2-cis relationship means that one substituent must be axial and one equatorial, whereas a 1,2-trans relationship means that either both substituents are axial or both are equatorial.

a) 1,5-trans-disubstituted
b) 1,6-cis-disubstituted
c) 1,2-trans-disubstituted