Pulse $0$:$15$: Consider Exhibit $5-19.$ Between the prices of $$5$ and $$6,$ which supply curve is most elastic and which is least elastic? $S_2$ is most elastic; $S_3$ is least elastic. $S_3$ is most elastic; $S_2$ is least elastic. $S_1$ is most elastic; $S_3$ is least elastic. $S_1$ is most elastic; $S_2$ is least elastic. $S_3$ is most elastic; $S_1$ is least elastic.