13. The lives of refrigerator are normally distributed with mean = 14 years and standard deviation o=2.5 years. (a) Draw a normal curve and the parameters labeled. (b) Shade the region that represents the proportion of refrigerator that lasts for more than 15 years. (c) Suppose the area under the normal curve to the right x =17 is 0.1151. Provide two interpretations of this result