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2. A race car accelerates from rest at a constant rate a for t₁=5.0sec, and then decelerates at a₂ = 5m/s² for t₂ =10sec, after which the car is going v₂ = 5m/s. 3 a. What was the acceleration of the car for the first 5.0s? b. What is the total distance traveled during the 15 seconds?