The energy cost of horizontal locomotion as a function of the body mass of a lizard is given by E = 26.5m^-0.34, where m is the mass of the lizard (in kilograms) and E is the energy expenditure (in kcal/kg/km). Suppose that the mass of a 5-kg lizard is increasing at a rate of 0.05 kg per day. Find the rate at which the energy expenditure is changing with respect to time.