A data set lists weights (lb) of plastic discarded by households. The highest weight is lb, the mean of all of the weights is lb, and the standard deviation of the weights is s lb. a. What is the difference between the weight of lb and the mean of the weights? b. How many standard deviations is that [the difference found in part (a)]? c. Convert the weight of lb to a z score. d. If we consider weights that convert to z scores between 2 and 2 to be neither significantly low nor significantly high, is the weight of lb significant?