Seventy percent of the students applying to a university

Question

Having problems understanding the calculations

Seventy percent of the students applying to a university are accepted. Using the binomial probability tables or Excel, what is the probability that among the next 18 applicants:

1. At least 6 will be accepted?
2. Exactly 10 will be accepted?
3. Exactly 5 will be rejected?
4. Fifteen or more will be accepted?
5. Determine the expected number of acceptances.
6. Compute the standard deviation.