2. The percent grade of a road is the ratio of vertical rise Ah to the horizontal change in distance d (expressed as a percent). A road is found to have a percent grade of 3.5%. (a) What is the horizontal distance, d, with a vertical rise of 980 m (Ah). ? Round to whole number in meter. (b) For 100 km horizontal distance, d, for a stretch of this road, what will be the vertical rise (Ah)? Round to whole number in meter. (4 marks) B Ah