Which statement about the motion of the particles at these points is not correct?
Particles at QQQ and SSS vibrate in phase because they are both at antinodes.
The particle at point PPP is at a node, meaning its displacement is always zero.
The particles at QQQ and RRR vibrate in phase with each other, although they have different amplitudes.
The stationary wave stores energy within each loop, resulting in zero net transmission of energy past point PPP.