I need help! I have answers but I need to understand the problem step by step. Part 1= 0.9963. Part 2= 49.43

A sample of size 115 will be drawn from a population with mean 48 and standard deviation 12. Use the @ Cumulative Normal Distribution Table if needed. (a) Find the probability that x will be greater than 45. Round the final answer to at least four decimal places. (b) Find the 90 percentile of x. Round the answer to at least two decimal places. Homework 2 #1 1 Page 12 / 27 Part 1 of 2 Find the probability that x will be greater than 45. Round the final answer to at least four decimal places. The probability that x will greater than 45 is Part 2 of 2 Find the 90" percentile of x. Round the answer to at least two decimal places. The 90 percentile of x is