Normal Distribution Probability and Problem Solving Questions

I don’t know how to handle this Mathematics question and need guidance. Let the random variable X follow a normal distribution with ?=40 and ?2=49.use the standard normal distribution table to solveFind the probability that X is greater than 50.Find the probability that X is greater than 20 and less than 53.Find the probability that X is less than 45.The probability is 0.1 that X is greater than what number?The probability is 0.03 that X is in the symmetric interval about the mean between which two numbers?