Name the mechanism for the reaction of 2-methylbut-1-ene with hydrogen bromide. Outline the mechanism for this reaction to form the major product, including all relevant curly arrows, lone pairs, and charges.

Draw the structure of the minor product formed in this reaction. Explain why this is the minor product with reference to intermediate stability.

Draw the skeletal formula of a functional group isomer of 2-methylbut-1-ene.

2-methylbut-1-ene can form a polymer. State the type of polymerisation and draw the repeating unit for the polymer formed.