1. What airflow is required to give a capture velocity of 150 ft/min at a distance 8 in. from the center of a 6-in.-diameter unflanged round opening? (15 points) 2. If a flange is added to the opening in Question 1, what airflow would then be required to give the same capture velocity? (10 points) 3. A flanged slot hood, 5 ft long, has an airflow of 1500 ft3/min. What is the capture (centerline) velocity of this hood at a distance of 15 in. in front of the slot? (15 points)