A 0.40 kg object undergoing simple harmonic motion has a the period of the oscillation? (a) 0.8 N/m, 0.5 s (b) 1.6 N/m, 7 s (c) 1.4 N/m, 2x s = -3 m/s2 when r=0.75 m. What is the spring constant and (d) 1.6 N/m, 2 s (e) 1.2 N/m, 2/3 s