The attendance at a baseball game at a certain stadium is normally distributed with a mean of 25,000 and a standard deviation of 1200. For any given game:

a) What is the probability that attendance is greater than 27,500?

b) what is the probability that attendance will be 25,000 or more?

c) what is the probability of attendance between 23,000 and 27,000?

d) what must the attendance be at the game for the game's attendance to be in the top 5% of all games?