The man has a weight of 198 lb , and the coefficient of static friction between his shoes and the floor is ? s = 0.53. determine where he should position his center of gravity g at d in order to exert the maximum horizontal force on the door. what is this force? part bdetermine where the man should position his center of gravity g at d in order to exert the maximum horizontal force on the door. express your answer to three significant figures and include the appropriate units. part cdetermine the maximum horizontal force the man can exert on the door. express your answer to three significant figures and include the appropriate units.