A simple harmonic oscillator is created by attaching a spring with a spring constant of 541 J/m², to two blocks as shown in the figure. The mass of block A is 2 kg, the mass of block B is 6 kg, the mass of the pulley is 4 kg, θA = 24°, and θB = 27°. The pulley can be modelled as a uniformly dense solid cylinder rotating around an axis through its center. All surfaces are frictionless, the pulley is frictionless, and the rope passes over the pulley without slipping. What is the period (in s) of oscillations of this system?