Imagine, Susana initiates a purchase by requesting an e-bike for her wedding anniversary. Her husband Wolfgang may then seek information from many sources, including his best friend Tom who owns a Brompton e-bike and is a key influencer in what models to consider. After presenting the alternative choices to Susana, Wolfgang then purchases her preferred model which, as it turns out, is a "Brompton" that ends up being used by all family members. Which of the following statements about the roles in the buying decision process is correct?