A car is used for transportation to work, taking kids to school, for entertainment, and for running errands. Suppose that the average number of hours the car is used for driving to work is two hours per day. Assume the times for driving to work are normally distributed and the standard deviation for the times is half an hour (0.5 hours). Find the probability that the car is used for driving to work between 1.8 and 2.75 hours per day.