The completion time of a standardized test for students follows a normal distribution with a mean of 50 minutes and a standard deviation of 3.5 minutes. Please include a sketch with each of your answers. a) If a student who wrote this test is randomly selected, nd the probability that their completion time is i. Less than 45 minutes. ii. Between 45 and 48 minutes. b) What was the minimum amount of time required by the 15% of students who needed the most time to complete the test