A simple harmonic oscillator consists of a block of mass 4.70 kg attached to a spring of spring constant 230 N/m. When t = 0.890 s, the position and velocity of the block are x = 0.124 m and v = 3.900 m/s. (1) what is the amplitude of the oscillations? What were the (2) position and (3) velocity of the block at t = 0 s?