please explain

it is no surprise that obese people are not only susceptible to diabetes but tend to have more Low-density lipoprotein (LDL), which is the main source of cholesterol buildup an: blockage in the arteries. Your colleague collected another sample to be analyzed. During analysis, you noticed the LDL level is normally distributed, with a mean of 123 mngl and a standard deviation of 41 mgde. K) What percentage of individuals from this population will have LDL levels 1 or more standard deviations above the mean? Use the 689599] rule L) What percentage of individuals from this population have more than 200 mgfd L? M) What percentage of individuals from this population have 100 or less