For saving energy, bicycling and walking are far more efficient means of transportation than is travel by automobile. For example, when riding at 11.0 mi/h, a cyclist uses food energy at a rate of about 420 kcal/h above what he would use if merely sitting still. (In exercise physiology, power is often measured in kcal/h rather than in watts. Here 1 kcal = 1 nutritionist's Calorie = 4186 J.) Walking at 2.70 mi/h requires about 240 kcal/h. It is interesting to compare these values with the energy consumption required for travel by car. Gasoline yields about 1.30 108 J/gal.(a) Find the fuel economy in equivalent miles per gallon for a person walking.1 mi/gal(b) Find the fuel economy in equivalent miles per gallon for a person bicycling.2 mi/gal