The cyclist in Figure 3 is pedaling at a cadence (revolutions per minute of the pedal) of 90 rpm when using both crank arm lengths. a. With an angular displacement of 1.18 radians and an angular distance of 6.28 radians m for the 145mm crank arm,, what is the average angular speed of the knee joint (in degrees/second) if the cyclist's pedaling cadence with the 145mm crank length if the cyclist's cadence is 90 rpm? b. For the 175mm crank length, if the angular displacement is 1.35 radians and the angular distance is 6.28 radians m, what is the average angular speed of the knee joint (in degrees/second) with the 175mm crank length if the cyclist's cadence is 90 rpm? c. Which crank arm length resulted in the faster angular speed of the knee joint when pedaling at the same cadence? d. Explain your answer to part C (i.e., how was the faster angular speed of the knee joint accomplished).I have attached figure 3 for reference.

Knee Angles with 145 mm Crank Arm Knee Angles with 175mm Crank Arm B petsparts.com 81.50 73.20 149.30 150.30 Figure 3: Cyclist using different crank arm lengths, 145 mm (left panel) and 175 mm (right panel). The position with the foot at the top of the crank (left image within each panel) is the "top dead center" position. The position with the foot at the bottom of the crank (right image within each panel) is the "bottom dead center" position. The knee joint angle (listed in white boxes) was measured between the thigh and the lower leg (i.e. "shank")