A school newspaper reporter decides to randomly survey15students to see if they will attend Tet (Vietnamese New Year) festivities this year. Based on past years, she knows that21%of students attend Tet festivities. We are interested in the number of students who will attend the festivities.

1. How many of the15students do we expect to attend the festivities? (Round your answer to the nearest whole number.) ___Students
2. Find the probability that at most3students will attend. (Round your answer to four decimal places.)
3. Find the probability that more than2students will attend. (Round your answer to four decimal places.)