Lance armstrong bikes at a constant speed up the col d’izoard, a famous mountain pass. assume his teammates do such a good job riding ahead of him that he can draft behind them and encounter no air resistance. this climb is described as "beyond classification" in terms of its difficulty. the climb is 14.1 km long at a 7.3º average grade. assume that the combined mass of lance and his bicycle is 83 kilograms. what is the magnitude of the work he does against the force of gravity? show work