please answer teh following and attached each in separate filesA company running

please answer teh following and attached each in separate filesA company running

please answer teh following and attached , each in separate files    A company running an urban rail service wishes to estimate its daily average number of late-running trains on weekdays. For 10 randomly selected weekdays, it finds the following numbers of late running trains: 32, 10, 9, 18, 25, 15, 14, 18, 22, 16 a)  Assuming the number of late running trains on a weekday is approximately normally distributed, calculate a 90% confidence interval for the mean number of late-running trains on a weekday. b)  If we did not have the assumption of normality, could we still calculate a confidence interval in this example? If not, suggest a way of overcoming this problem. WechatIMG557.jpeg2022-04-01_10.01.46.png2022-04-01_10.01.541.png