A production process is checked periodically by a quality control inspector. The inspector selects simple random samples of finished products and computes the sample mean product weights. The test results over a long period of time show that 30% of the values are over 19.5 pounds and another 30% are less than 16.5 pounds. The population variance of the products produced by this process is 83.21 What is the sample size used by the inspector for each sample? Show your work and write your answer on paper,