Please answer it asap. I'll give positive rating,

mention 2: The time to failure random variable for a battery follows a normal distribution, with mean = 800 hours and standard deviation: 65 hours. a) Find the probability that the component will fail between 22,000 hours and 23,000 hours. b) Find the failure rate of a component that has been working for 22,000 hours. :2) If no more than 5% of the batteries will require warranty service. what is the maximum number of hours for which the battery should be warranted? d) If the manufacturer tested 15 batteries, what is the probability that two or more batteries will within 22,000 hours