737NG not capturing glide slope

SOLVED:Exercises 51-54 are based on the idea of a glide slope (the angle the flight path makes with the ground). Precision Approach Path Indicator (PAPI) lights are used as a visual approach slope aid for pilots landing aircraft. A typical glide path for commercial jet airliners is 3^∘ . The space shuttle had an outer glide approach of 18^∘-20^∘ . PAPI lights are typically configured as a row of four lights. All four lights are on, but in different combinations of red or white. If all four light