napisz wzory i nazwy izomerow dla heksanu

* CH3-CH2-CH2-CH2-CH3 n-heksan * CH3(CH2)2CH(CH3)2 2-metylopentan * CH3CH2CH(CH3)CH2CH3 3-metylopentan * (CH3)3CCH2CH3 2,2-dimetylobutan * (CH3)2CHCH(CH3)CH3 2,3-dimetylobutan