_ 8. SAT scores distribute normally in the population with p=500 and 0:100. . k a. What is the probability of randomly selecting a score below 430? b. What raw scores form the boundaries of theimiddle 95% of the distribution? (Please note that on 3'\" Blackboard this question is divided into two parts part 1 asks about the lower boundary and part two about the upper boundary.) ' l i c. How many people (in percentages) receive a grade between 600 to 650? ., d. Which raw score is the 90th percentile