(a) How long in minutes will the energy in a 946 k] (226 kcal) cup of yogurt last in a woman doing work at the rate of 140 W with an efciency of 20.0% (such as in leisurely climbing stairs)? l l min (b) Does the time found in part (a) imply that it is easy to consume more food energy than you can reasonably expect to work off with exercise? 0 Yes 0 No