b)If the total cholesterol values for a certain population are approximately normally distributed with a mean of 200 mg/100 ml and a standard deviation of 20 mg/100 ml, find the probability that an individual picked at random from this population will have a cholesterol value:

i.Between 180 and 200 mg/100 ml

ii.Greater than 225 mg/100 ml

iii.Less than 150 mg/100 ml