Carry out a gait analysis on motion capture data on two subjects walking. Motion capture units are in mm $.$ The sampling frequency of the cameras is $200$ Hz and the sampling frequency of the force plates is $1000$ Hz $.$

$($a$)$ Calculate the knee joint angles for the two subjects. Which one performs higher degree of flexion in the swing phase?

$($b$)$ Calculate the gait speed for both in $\frac{m}{s}$

$($c$)$ Where in the gait cycle is the highest knee flexion$/$extension moment for them both?