Racecar A is traveling on a straight portion of the track while racecar B is traveling on a circular portion of the track. At the instant shown, the speed of A is increasing at the rate of 10 m/s², and the speed of B is decreasing at the rate of 6 m/s². For the position shown, determine 

(a) The velocity of B relative to A, 

(b) The acceleration of B relative to A.

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200 km/h 300 m 50° 240 km/h A