The waveform from a mechanical vibration is sensed by a velocity-sensitive vibrometer. The oscilloscope trace indicates that the motion is essentially simple harmonic. A 1-kHz oscillator is used for time calibration and 4 cycles of the vibration are found to correspond to 24 cycles from the oscillator. Calibrated vibrometer output indicates a velocity amplitude (1/2 peak-to-peak) of 3.8 mm/s. Determine (a.) the displacement amplitude in mm and (b.) the acceleration amplitude in standard g's.