Consider the following model of the forces acting on the foot when a person stands on their tiptoe on a horizontal surface. Below, the first image is an anatomical sketch of a foot showing the musculoskeletal structure, emphasizing the location of the tibia and Achilles tendon, and the second is a simplified model of the foot as a single rigid body showing the location and axis along which the forces from the floor, tibia, and Achilles tendon act upon the foot when a person stands tiptoe. Assume the person stands on a single foot and that the acceleration due to gravity is .

Dissected By Dc 4.M. Of orme "U.Br.Columbia - Drawing Ligaments of ankle joint - English labels" by Department of Anatomy, University of British Columbia, UBC and J.M. Odiome, UBC, license: CC BY-NC-SA. Created for: Department of Anatomy (now Department of Cellular and Physiological Sciences) at the University of British Columbia. Source: website Clinical Anatomy, http://www.clinicalanatomy.ca 150 - 25 cm 18 cm a. Using the simplified model above, make a complete and properly labeled force diagram for the foot. Ignore the mass of the foot