Larger animals have sturdier bones than smaller animals. a mouse's skeleton is only a few percent of its body weight, compared to 16% for an elephant. to see why this must be so, recall, that the stress on the femur for a man standing on one leg is 1.4% of the bone's tensile strength. suppose we scale this man up by a factor of 10 in all dimensions, keeping the same body proportions. (assume that a 70 kg person has a femur with a cross-section area (of the cortical bone) of ,4.8x10^-4 m^2 a typical value.) a. both the inside and outside diameter of the femur, the region of cortical bone, will increase by a factor of 10. what will be the new cross-section area? b. the man's body will increase by a factor of 10 in each dimension. what will be his new mass?