The weights of 9-ounce bags of a particular brand of

The weights of 9-ounce bags of a particular brand of potato chips can be modeled by a Normal distribution with mean μ = 9.12 ounces and standard deviation σ = 0.05 ounce . Sketch the Normal density curve. Label the mean and the points that are 1, 2, and 3 standard deviations from the mean.