I am looking to solve (c) P(caffeine | with cream and/or sugar). I believe (b) is B. 9.6%.

15. A group of coffee drinkers were asked if a) How many people were they prefer their coffee black or with cream surveyed? and/or sugar and if they prefer caffeine or decaf coffee. b) P(drinks black decaf coffee) A. 8.8% B. 9.6% Black With Cream and/or Sugar C. 10.5% D. 12.3% Caffeine 26 64 Decaf 12 23 c) P(caffeine | with cream and/or sugar) A. 73.6% B. 75.1% C. 78.4% D. 80.7%