Christine Wong has asked Dave and Mike to help her move into a new apartment on Sunday morning. She has asked them both, in case one of them does not show up. From past experience, Christine knows that there is a 40% chance that Dave will not show up and a 30% chance that Mike will not show up. Dave and Mike do not know each other and their decisions can be assumed to be independent. Required:
a. a. What is the probability that both Dave and Mike will show up? (Round your answer to 2 decimal places.)
b. What is the probability that at least one of them will show up?
c. What is the probability that neither Dave nor Mike will show up?