3. City X and city Y are 37 km apart. The figure shows the graphs for Carmen and Denise cycling on the same straight road between city X and city Y during the period 2:00 to 5:00 in the afternoon. Carmen cycles at a constant speed. Denise stops cycling during the period 3:56 to 4:32 in the afternoon. Y 37 30 Distance from city X (km) Carmen Denise 36mins 4 X 0 2:00 3:27 3:56 4:32 5:00 Time (a) How long does Denise cycle during the period 2:00 to 5:00 in the afternoon? 33 km (b) How far from city Y do Carmen and Denise meet? 22.5km (c) Find the speed of Denise before rest in km/h. km/h (d) Find the speed of Denise after rest in m/s. (correct your answer to 3 significant figures) (e) Without actual calculation, judge whether the average speed of Carmen is higher than that of Denise. Explain your