$($a$)$

$2.$ Figure $1($a$)$ shows two history graph for the same wave, One history graph is for $x=2m$ and the other is for $x=4m.$ We do not know how fast the wave is going or which direction it is traveling. Positive $x$ is to the right.

$($a$)$ From the history graphs, determine which direction the wave is traveling. Explain your reasoning.

$($b$)$ How fast is the wave traveling?

$($c$)$ Draw a snapshot graph for the wave at $t=0\mathrm{.}1s.$