Fоr eаch оf the fоllowing pаrts, pleаse include a sketch even if you are using the calculator to obtain your answers If you are using the calculator to obtain your answers, please also include the function and input that you entered into the calculator, otherwise include the steps you used for a table look up. 3. Suppose marathon run times follow a normal distribution with a mean of 4.2 hours and a standard deviation of 0.5 hours. a) What is the probability that a marathon runner will finish the marathon in more than 4.8 hours? (Round answer to four decimal places). b) What is the probability that a marathon runner will finish the marathon between 3.5 and 4.0 hours? (Round answer to four decimal places).