The time it takes a person to lose weight following a healthy diet with regular exercise may be looked upon as a random variable having a normal distribution with mean = 18.4 lbs per month and standard deviation = 5.8 lbs per month.

Find the probabilities that during a period of healthy dieting and exercising a person's weight will be reduced by at least 20 lbs per month,between 5 and 15 lbs per month,at most 30 lbs per month and between 15 and 25 lbs per month?

Use the z formula and the normal table to solve the following problems.

please include diagrams