(d) The table below shows the effect of the intensity of exercise on the percentage of energy obtained from lipids and carbohydrates. Intensity of exercise / arbitrary units 20 40 60 80 100 Percentage of energy obtained (%) From lipids From carbohydrates 60 50 30 20 0 40 50 70 80 100 Using the information in the table, describe the effect of the intensity of exercise on the percentage of energy obtained from lipids and carbohydrates. (3)