3,3-dimethyl-1-butene

Account for the formation of both 3-bromo-2, 2-dimethyl butane and 2-bromo-2, 3-dimethyl butane from the reaction of HBr with 2, 3-dimethyl-1-butene.

Ozonolysis of 2,3-dimethyl-1-butene followed by reduction with zinc and water gives

The major products obtained on ozonolysis of 2,3-dimethyl-1-butene followed by reduction with Zn and H_2O are-