Understanding Wave Pulse Velocity: Equations and Graphs for Homework

[Ipos Manger]

Homework Statement

In the picture.

Homework Equations

I guess λ=cv? I'm not sure on this one.

The Attempt at a Solution

I don't know how the velocity and the displacement are related in this exercise. However, i do recall the graphs of displacement, velocity and acceleration in SMH.

 

[Ipos Manger]

Bump, really need help!