A simple harmonic oscillator consists of a block of mass 3.90 kg attached to a spring of spring constant 169 N/m. When t = 3.00 s, the position and velocity of the block are x = +0.129 m and v = +3.415 m/s.
(a) What is the amplitude of the oscillations?
(b) What was the position of the mass at t = 0 s?
(c) What was the velocity of the mass at t = 0 s?