Give the structure, exclusive of stereochemistry, of the principal organic product formed...

Give the structure, exclusive of stereochemistry, of the principal organic product formed on reaction of 2,3-dimethyl-1,3-butadiene with each of the following:

(a) 2 mol H2, platinum catalyst

(b) 1 mol HCl (product of 1,2-addition)

(c) 1 mol HCl (product of 1,4-addition)

(d) 1 mol Br2 (product of 1,2-addition)

(e) 1 mol Br2 (product of 1,4-addition)

(f) 2 mol Br2

(g)