Awater wave traveling in a straight line on a lake is described by the equationy(x, t)=(3.75cm)cos(0.450cm? 1x+5.40s? 1t)where y is the displacement perpendicular to the undisturbed surface of the lake. part ahow much time does it take for one complete wave pattern to go past a fisherman in a boat at anchor? part bwhat horizontal distance does the wave crest travel in that time? part cwhat is the wave number? part dwhat isthe number of waves per second that pass the fisherman? part fwhat is the maximum speed of his cork floater as the wave causes it to bob up and down?