An oscillator consists of a block attached to a spring (k = 497 N/m). At some time t, the position (measured from the system's equilibrium location), velocity, and acceleration of the block are x = 0.0995 m, v = -12.1 m/s, and a = -145 m/s2. Calculate (a) the frequency of oscillation, (b) the mass of the block, and (c) the amplitude of the motion.