I need help with this assignment please

2. Scores on the SAT form a normal distribution with a mean of u = 500 with o = 100. If the state college only accepts students who score in the top 60% on the SAT, what is the minimum score needed to be accepted? (6 points) 3. For a normal population with u = 100 and o = 20, a. What is the probability of obtaining a sample mean greater than 110 for a sample of n = 4 scores? (4 points) b. For a sample of n = 25 scores, what is the probability that the sample mean will be within 10 points of the population mean? (6 points)