The class I took as a whole discovered several mistakes in the solution manual which the Professor agreed with. I personally hate when the practice questions introduce additional material/mechanistic pathways. The questions also force you to make assumptions about ring openings/forming that seemed unfair and unusual. In a test question you are asked to draw a mechanism/synthesis towards a new product. You can logically deduct their must be a ring opening…unusual pathway if you can’t get your reactant to the product. The book skips this logic by just asking you to draw the major product and assumes you go by a ring opening/unusual mechanism. (And I understand Sn2 ring mechanisms. The problems are just odd)