Sound wave represented as a displacement wave travels in positive x – direction & y – axis represents particle’s displacement. Match list I with list II

Vparticle=−Vwave∂y∂xAt point 1, slope is zero. Therefore, velocity of particle =-slope=0At point 2, slope is -ve, therefore velocity of particle =-slope=-(-ive)=  +ive. acceleration=0At point 3, slope is zero, therefore velocity of particle = - slope =0At point 4, slope is +ive, therefore velocity=-slope=-ive  and acceleration =0