1) C8H16: CH3-CH(CH3)-C(CH3)2-CH=CH2) C10H22: CH3-CH(CH3)-CH(CH3)-CH(CH3)-CH33) C7H16: CH3-CH2-C(CH3)(CH3)-CH34) C10H22: (CH3)3C-C(CH3)2-C(CH3)3
1) C8H16: CH3-CH(CH3)-C(CH3)2-CH=CH
2) C10H22: CH3-CH(CH3)-CH(CH3)-CH(CH3)-CH3
3) C7H16: CH3-CH2-C(CH3)(CH3)-CH3
4) C10H22: (CH3)3C-C(CH3)2-C(CH3)3