A snowstorm started a midnight. for the first 4 hours, it snowed at an average of one-half inch per hour. the snow then started to fall at an average rate of one inch per hour for the next 6 hours. then it stopped snowing for 3 hours. then it started snowing agains at an average rate of one-half inch per hour for the next 4 hours until the storm was over. determine the average rate of snowfall over the length of the storm. state the rate to the nearest hundredth of an inch per hour.