Propose several syntheses of cis-3-heptene, beginning with each of the following molecules. Note in each case whether your proposed route gives the desired compound as a major or minor final product.

(a) 3-Chloroheptane;

(b) 4-chloroheptane;

(c) 3,4-dichloroheptane;

(d) 3-heptanol;

(e) 4-heptanol;

(f) trans-3-heptene;

(g) 3-heptyne.