1-8. A car is traveling on a straight street at a velocity . After the driver observed a block ahead of the car, it takes the driver seconds to react and decelerate at .

1) For a normal driver, assume is normally distributed

2) For a drunk driver, assume

Determine the possibility that the car would hit the block.

Solution: the distance before a driver reacts and decelerates

1) For a normal driver

2) For a drunk driver