(2pts each) Last year, students in Stat 350 had final grade scores that closely followed a normal distribution with mean 60 and standard deviation 6. a. What proportion of students had a final grade score of 56 or below? Round your answer to four decimal places Proportion: b. What proportion of students earned a final grade score between 51 and 68 ? Round your answer to four decimal places Proportion: c. Students with higher final grade scores earned better grades. In total, 21\% of students in Stat 350 earned an A last year. What final grade score was required in order to earn an A last year? Round your answer to two decimal places Score:
