Give the major organic product formed when hydrogen bromide reacts with each of the alkenes in Problem

Question:

Give the major organic product formed when hydrogen bromide reacts with each of the alkenes in Problem 6.3 in the absence of peroxides and in their presence.
In Problem 6.3
Write the structure of the major organic product formed in the reaction of hydrogen chloride with each of the following:
(a) 2-Methyl-1-butene
(b) cis-2-Butene
(c)