Attempt Question $7,$ Chapter $6,$ on page $192(7$th edition$).$ If you're using the $8$th edition of the textbook, it's on page $198$ in the required textbook for this course $($Air Control Company Problem$).$ The Question is the same in the $6$th$,7$th$,$ and $8$th edition but the page number might differ slightly. However, I have attached the question here for you. Just answer the question as asked in the textbook.