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The exam scores on a certain Society of Actuaries (SOA) professonal examination are Normally distributed with a mean score of u = 70% and a standard deviation of o 0% ta) What is the probability that a random chosen person who is writing the SOA exam wil score at most 68%7 Note, when findingning -values, use three decimals. use tour demais in your answer (b) What proportion of al persons willing the SOA Exam wil score between 73% and 83% on the exam? Use four decimals in your answer 1425% of a persons writing the SOA Examination will not pass. What is the minimum mark needed to pass this and Enter your answer to two decimal places and enter as a percentage