Please help me complete the missing part. I have most of the work done but I'm missing something and I don't know how to get it.

36. Atmospheric Pressure. Atmospheric pressure P at altitude a is given by P = Poe 0.00005al where Po is the pressure at sea level. Assume that Po = 14.7 1b/in' (pounds per square inch). a) Find the pressure at an altitude of 1000 fu. b) Find the pressure at an altitude of 20,000 ft. c) At what altitude is the pressure 1.47 Ib/in? tw d) Find the rate of change of the pressure and in- terpret its meaning.36) P = Pop - 0. 00005 (1 Po = 14 . 7 Uo / In 2 (1 ). a = Dooft = 1000 * 12 inches = 12000 inch Pressure at attitude = 100 0 f T is = 14. 7 x p- 0.00005 x 12000 = 8. 067 Us / inch 2 5) 2000of+ = 20000 X 12 inch Pressure at cittitucle = 240000 inch is = 14. 7xe-0.0000 5 x 240000 = 1.03 10-5 ( ) P = 1. 47 (b / in 2 C1= ? Po e- 0.0000 5 a