Design specification for a motor housing states that it should weigh between 19 and 21 kgs. The process that produces the housing yields a mean of 20.0 kg and a standard deviation of 0.5 kg. The distribution of output is Normal. a. What percentage of housing will not meet the design specification? (Round the final answer to 2 decimal places.) z % b. Within what values should 99.73 percent of sample means of this process fall if samples of n = 17 are taken? (Round the final answers to 2 decimal places.) Interval