3. Fog can greatly reduce the intensity of oncoming headlights. The distance, d, in metres, of an oncoming car whose headlights have an intensity of light, I, in lumens (Im), is given by d = -167log 125) a) How far away is a car whose headlight intensity is 50 Im? b) If the headlight intensity doubles, does this mean the car is half as far away? Explain. c) What implications do these results have on recommended driver behaviour? [5]