Students in a statistics class were asked if they worked extra problems. I created a cross table to look at the relationship between "worked extra problems" and Final grade. Final Grade A B Below C Worked Extra Problems Yes 0.12 0.09 0.06 0.02 No 0.18 0.26 0.23 0.04 a) Find the probability that a student both received a B grade and worked extra problems. It is b) Find the probability that a randomly chosen student who received a B also worked extra problems. It is (Use 3 decimals.) c) True or False. The events "worked extra problems" and "B grade" are statistically independent. Yes=1 and No=0. The answer is