The mass of block B is 4 kg, the mass of block A is 3 kg, and the angle θ = 60°. The surface along which block A slides is frictionless. The pulley can be modelled as a uniformly dense solid cylinder rotating around an axis through its center. The mass and radius of the pulley are 2 kg and 5 cm, respectively. The two springs are massless and have spring constants k1 = 200 J/m2 and k2 = 600 J/m2. What is the angular frequency (in rad/s) of simple harmonic oscillations of this system?