Problem $2$ Snapshots and History

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$($a$)$ The figure on the left is a snapshot of a pulse traveling to the right at $1\frac{m}{s}$ at time $t=0.$ Sketch $y$ versus $t$ for the position $x=6m$ from $t=0$ to $t=6s.($b$)$ A different pulse also traveling to the right at $1\frac{m}{s}$ is shown in the right panel for the position $x=0.$ Sketch a snapshot of the pulse $(y$ versus $x)$ for the time $t=1,$