Question 2 (Marks 10) Evaluate the following survey designs: a) A researcher suggests mailing a small safe (a metal file box with a built-in lock) without the lock combination to respondents, with a note explaining that respondents will be called in a few days for a telephone interview. During the telephone interview, the respondent is given the combination and the safe may be opened. b) A shopping mall that wishes to evaluate its image places packets (including a questionnaire, cover letter and a stamped return envelope) in the mall where customers can pick it up if they wish. c) An email message is sent to individuals who own computers, asking them to complete a questionnaire on a website. Respondents answer the questions and then have the opportunity to play a poker-machine game on the website. Each respondent is guaranteed a monetary incentive but has the option to increase it by playing the poker-machine game