а) CH2 = CH - C(CH3)(CH3) - CH(CH3) - CH3
б) CH3 - CH = CH - CH(CH2-CH3) - C(CH3)(CH3) - CH3
в) CH2 = CH - CH2 - C(CH3)(CH3) - C(CH3)(CH3) - C(CH3)(CH3) - CH3
а) CH2 = CH - C(CH3)(CH3) - CH(CH3) - CH3
б) CH3 - CH = CH - CH(CH2-CH3) - C(CH3)(CH3) - CH3
в) CH2 = CH - CH2 - C(CH3)(CH3) - C(CH3)(CH3) - C(CH3)(CH3) - CH3