Interestingly, there have been several studies using cadavers to determine the moment of inertia of human body parts by letting them swing as a pendulum about a joint. In one study, the center of gravity of a \(5.0 \mathrm{~kg}\) lower leg was found to be \(18 \mathrm{~cm}\) from the knee. When pivoted at the knee and allowed to swing, the oscillation frequency was \(1.6 \mathrm{~Hz}\). What was the moment of inertia of the lower leg?