Isoprene

[SINGER]

Isoprene (2-methyl-1,3-butadiene) reacts with the following:
(1) hydrogen chloride (1 mole equivalent) in ether
(2) deuterium chloride (1mole equivalent) in ether
(3) bromine (1 mole equivalent) in carbon tetrachloride
(4) excess hydrogen gas in the presence of a PtO2 catalyst
(5) excess mercury (II) acetate and methanol followed by sodium borohydride
(6) excess ozone followed by zinc and acetic acid
How should the structures of the obtained products from each of the reagents be drawn?