The amount of time to complete a physical activityin a PE class is normally distributed with a mean of39.8 seconds and a standard deviation of 6.3seconds. Round answers to 4 decimal places.a) What is the probability that a randomly chosenstudent completes the activity in less than 32.3seconds? b) What is the probability that a randomly chosenstudent completes the activity in more than 45.3seconds? c) What proportion of students take between 34.6and 44.9 seconds to complete the activity?d) 80% of all students finish the activity in less than seconds.