Bonus Problem 1: (10 pt) Worker A, weighing 50 kg, has a VO₂ max of 80 ml/kg/min and worker B, weighing 50 kg, has a VO₂max of 90 ml/kg/min. When walking

steadily at 5 km/h with no extra load, A is working at 50% of his VO₂ max, and B at 60% of his VO₂ max. If each of them has to carry a 15 kg load that requires the additional consumption of 1.5 liter of oxygen per minute, which worker will tire more quickly? Provide a brief calculation to support your choice. (You can use the information in Problem 6 and above)