(Refer to figure 137.) What is the distance (B) from the beginning of the runway to the touchdown zone marker?

While flying a 3° glide slope, a headwind shears to a tailwind. Which conditions should the pilot expect on the glide slope?

(Refer to figure 136.) Which illustration would a pilot observe if the aircraft is “slightly high” (3.2°) on the glidepath?

(Refer to figure 136.) Which illustration would a pilot observe if the aircraft is less than 2.5°?