2 (50 points) A 3.2 miles section of a 4-lane divided highway includes a 0.6 mile portion on a horizontal curve and 0.1 mile spiral at one end of the curve. The highway has 10 feet lane width, 4 feet shoulder width, 35 feet median, AADT of 8,500 and less than 3 percent grades. A. Calculate the predicted total crash frequency of the straight portion B. Calculate the predicted crash rate for the curve if the radius is 1200 feet. C. Calculate the predicted crash frequency for both portions if the lanes are to be widened to 11 feet. If needed, use HSM default value for pra lane