Can anyone assist me with these practice problems?

(Cambridge, 4.11) The diagram shows a piece of cork floating on the surface of water when a wave travels through the water to the right. Copy the diagram, and add to it the position of the cork half a wave period later. (Cambridge, 4.14) The graph shows the variation with y/cm 0.010- distance x of the displacement y of air molecules as a sound wave travels to the right through air. Positive displacement means motion to the right. The speed of 0.005 sound in air is 340 m/s. Determine the frequency of the sound wave. Distan b. State a distance x at which i a compression and ii a rarefaction occurs. -0.005 -0.010 F - ( 0.3. 6 ) . ( 0:1. 0 )