A spring-mass system oscillates with simple harmonic motion with amplitude A repeating one full cycle in time T. The mass travels a distance of A in a time span t1 to t2 of T/4 (t1 = 0, while t2 = T/4)____________ a) only if the mass is at rest at t1 b) only if the mass is at max speed at t1 c) only if either a) or b) are true d) only if neither a) nor b) are true e) regardless of the state of the mass at t1