An airplane flies at an altitude of 5 miles toward a point directly over an observer. Consider 0 and x as shown in the figure below. 5 mi X Not drawn to scale (a) Write 0 as a function of x. 0 (x) = (b) The speed of the plane is 366 miles per hour. Find d0/dt when x = 6 and x = 5. (Round your answers to three decimal places.) de when x = 6 rad/h dt de when x = 5 rad/h dt