ACT scores for high school students are normally distributed with mean=24.1 and standard deviation=4.3. A student from a high school is randomly selected. Answer the following questions:
1) Find the probability that the student's ACT score is less than 22?
2) Find the probability that the student's ACT score is between 22 and 30?
3) Find the probability that the student's ACT score is more than 30?
4) What is the minimum ACT score that places a student at the top 5%?