At push$-$off phase during walking, the anterior$/$posterior ground reaction force at the center of pressure is $293$ N and the vertical ground reaction force under the right foot is $923$ N$.$ The foot has a length of $0\mathrm{.}20$ m and is $169$ degrees relative to the ground. The center of pressure is located at the end of the foot segment.

Calculate the total torque generated by the ground reaction force about the ankle. $\_\_$ Nm

When the knee is fully extended $($i$.$e$.$ the shank is horizontal$),$ what is the muscle force required by the quadriceps to hold the position? $\_\_$ N