The weights of all the boxes of corn flakes filled by a machine are normally distributed, with a mean weight of 15.5 ounces and a standard deviation of 0.4 ounce. Find the z -scores for boxes which...

The weights of all the boxes of corn flakes filled by a machine are normally distributed, with a mean weight of 15.5 ounces and a standard deviation of 0.4 ounce.
Find thez-scores for boxes which weigh 14.5 ounces and 16.5 ounces. (Round your answers to two decimal places.)