personal c Wi-Fi hotspot? How is the result affected by the ad- ditional information that the survey subjects volunteered to respond? Denomination Effect. In Exercises 13-16, use the data in the following table. In an experiment to study the effects of using four quarters or a $1 bill, college students were given either four quarters or a $1 bill and they could either keep the money or spend it on gum. The results are summarized in the table (based on data from "The Denomina- tion Effect," by Priya Raghubir and Joydeep Srivastava, Journal of Consumer Research, Vol. 36). Purchased Gum Kept the Money Students Given Four Quarters 27 16 Students Given a $1 bill 12 34 13. Denomination Effect a. Find the probability of randomly selecting a student who spent the money, given that the student was given four quarters. b. Find the probability of randomly selecting a student who kept the money, given that the stu- dent was given four quarters. c. What do the preceding results suggest? 14. Denomination Effect a. Find the probability of randomly selecting a student who spent the money, given that the student was given a $1 bill. b. Find the probability of randomly selecting a student who kept the money, given that the stu- dent was given a $1 bill. c. What do the preceding results suggest? 15. Denomination Effect a. Find the probability of randomly selecting a student who spent the money, given that the student was given four quarters. b. Find the probability of randomly selecting a student who spent the money, given that the student was given a $1 bill. c. What do the preceding results suggest? 16. Denomination Effect a. Find the probability of randomly selecting a student who kept the money, given that the stu- dent was given four quarters. b. Find the probability of randomly selecting a student who kept the money, given that the stu- dent was given a $1 bill. C. What do the preceding results suggest