besok di kumpulin tolong bantu yah

1. a. 4,4-dimetil-heptana
b. 3-etil-6-metil-4-heptuna

2. a. CH3 CH2 CH2 CH2 CH2 CH2 CH2 CH2 CH3
b. CH3 CH (CH3) C (CH3)2 CH2 CH2 CH2 CH2 CH3