Specifications for a part for a $3-$D printer state that the part should weigh between $24\mathrm{.}9$ and $25\mathrm{.}9$ ounces. The process that produces the parts has a mean of $25\mathrm{.}4$ ounces and a standard deviation of $22$ ounce. The distribution of output is normal. Use Table $A.$

a$.$ What percentage of parts will not meet the weight specs?

Note: Round your $"$z$"$ value and final answer to $2$ decimal places.

Percentage of parts $$

b$.$ Within what values will $99\mathrm{.}74$ percent of the sample means of this process fall if samples of $n=12$ are taken and the process is in control $($random$)?$

Note: Round your answers to $2$ decimal pleces.