3. The distribution of blood cholesterol levels in a large population of people of the 14 years or older boys is roughly normal with mean 175 mg of cholesterol per deciliter of blood (mg/dl) and the standard deviation is 30 mg/dl. Then answer the following questions (25+3bonus points) a. What percent of scores are above 215? Z score Table value b. What percent of scores are between 150 and 220? Z scores Table value Find the least cholesterol level to be in the top 20%. Table value Z score work d. Find the range of middle 90% of values. Table values Z scores work e. Find the 40th percentile value. Table values Z scores work f. Without spending too much time on calculations find out the variance of the given distribution. (Bonus)