do a,b,d and the last question just asking for if its indicate or not cis trans isomersim is possible its a yes or no.

CH3 (a) H3C-C-CH CH3 saturated unsaturated CH3 (b) H2C=C-C-CH3 () -C- CH3 CH3 saturated unsaturated H2 (c) H2C=C-C-C-CH CH2 H saturated unsaturated (d) H2 H2 H2 (0) - H3C-C-C-C-CH3 saturated d 2-Methyl-2-butene -2- no yes