5.40 An antisubmarine jet aircraft with the following characteristics is above the Atlantic Ocean and is searching for a target submarine: mro 17,000 kg, m, = 5,000 kg, S = 42 m, CL = 2.2, CD, 0.025, e=0.87, b = 20 m, C=0.84 lb/h/lb a. Determine the maximum duration (in hour) that this aircraft is able to search for a target. b. For this duration, what should be the velocity if it flies at 10,000 ft?