Help please

Company XYZ knows that replacement times for the coffee makers it produces are normally distributed with a mean of 10.6 years and a standard deviation of 1.2 years. Let X be the replacement time of a randomly selected coffee maker. a. What is the distribution of X? X ~ ( --) Please show the following answers to 4 decimal places. b. If a coffee maker is randomly chosen, find the probability that it will be replaced in more than 7.7 years. c. If a coffee maker is randomly chosen, find the probability that it will be replaced between 9.3 and 10.7 years. Please show the following answer to 1 decimal place. d. If the company wants to provide a warranty so that only 9% of the coffee makers will be replaced before the warranty expires, what is the time length of the warranty? years