2. A marketing manager for Isaac's, an expensive men's clothing store, is concerned that prots have dropped, and he has noticed that many customers who once were regulars are not coming back anymore. He decides to send out a questionnaire to a sample of old customers, using addresses from his mailing list. He wrote a letter asking customers to respond to his questionnaire. He also provided a postage paid envelope for return of the completed forms. The instructions on the short questionnaire were: (1) Please discuss the things you liked most about this store the last time you purchased clothing here. (2) Please explain what you like least about this store. Please discuss anything that bothers you. (3) Please tell us at what other men's clothing stores you shop, and what it is about each store that you like? a) Is a mail survey useful for questions like these? Why or why not? b) What would you recommend if the manager asked you for ideas on how to get better information about his