Combinations and Permuatations?

There are five seniors and four juniors are nominated for President, Vice President, and Treasurer of student government. A president will be chosen first. A vice president will then be chosen from the remaining nominees. A Treasurer is chosen last. Assuming that everyone has an equal chance of winning, what is the probability that a senior will win President and Vice President and a Junior will win Treasurer? Round to the nearest tenth of a percent