2. A high blood cholesterol level raises the risk of atherosclerosis, an artery-thickening condition that may restrict blood ow to the heart, brain, kidneys, and other organs. This increases the chance of renal failure, heart attack, and stroke, among other illnesses. Adult men of a certain racial group have cholesterol levels that are roughly regularly distributed, with a mean of 153.2 mg/dL and a standard deviation of 32.3 mg/dL. a. A male adult with a cholesterol level above 200 mg/dL is at high risk. What is the likelihood of being in a high-risk situation? b. In contrast, if an adult male's cholesterol level is one standard deviation or more below the mean, he has a low risk. What percentage of adult males are considered to be low- risk? 3. Research on a particular enzyme activity revealed an exponential distribution with a mean of 10 hours for the period of activity preceding total inactivity. Find the rate of failure