A department store polled 600 shoppers regarding whether-or-not they made a purchase and whether-or-not they were pleased with the service they received from the store's staff. Of those who had made a purchase, 125 were happy with the service and 11 were not. Of those who had not made a purchase, 148 were happy with the service and 316 were not. Address parts (a) through (c). Leave your answer as a fraction. [1 pt ] (a) What proportion of all the shoppers were happy with the service and made a purchase? [1 pt ] (b) What proportion of those customers happy with the service made a purchase? [1 pt ] (c) What proportion of those customers who made a purchase reported being happy with the service?