Solve the all parts of given problem:
Problem: A car traveling 56.5 km/h is 27.7 m from a barrier when the driver slams on the brakes, The car hits the barrier 2.01 s later.
Part A: What is the car's constant deceleration magnitude before impact?
Part B: How fast is the car traveling at impact?
Can someone please explain what the heck is going on?