No. of stereoisomers in C5div0please answer my question

Dear student
 
There are a total of 13 isomers with the molecular formula C5H10.
There are 6 isomeric alkenes including the cis/trans (E/Z) isomers of pent-2-ene
There are also 7 cycloalkanes: cyclopentane (CAS 287-92-3), methylcyclobutane (CAS 598-61-8), ethylcyclopropane (CAS 1191-96-4), 1,1-dimethylcyclopropane (CAS 1630-94-0), (R,R)-1,2-dimethylcyclopropane or (1R-trans)-1,2-dimethylcyclopropane (CAS 20520-64-3), (S,S)-1,2-dimethylcyclopropane or (1S-trans)-1,2-dimethylcyclopropane (CAS 38447-23-3) and (R,S)-1,2-dimethylcyclopropane or cis-1,2-dimethylcyclopropane (CAS 930-18-7). Trans-1,2-dimethylcyclopropane is chiral and exists in the form of the two enantiomers