A tourist bureau for a western state conducted a study which showed that 65% of the people who seek information about the state actually come for a visit. The office receives 15 requests for information on the state.
A) Find the probability that all 15 of the people visit the state.
B) Find the probability that at least 12 of the people visit the state.
C) Find that from 4 to 7 people visit the state (including 4 and 7).