A wheel rotates under the influence of a motor that exerts a variable torque given by \(\tau(\theta) = C\theta^3\), where \(C\) is a positive constant and \(\theta\) is the angular displacement in radians. The wheel starts from rest and rotates from \(\theta = 0\) to \(\theta = \Phi\). What is the total work done on the wheel by the motor during this angular displacement?