**Question:**A siren moving with a constant speed emits a sound wave with frequency $ f_0 $. The graph shows the frequency you hear as you stand at rest at $ x = 0 $ on the x-axis. Which of the following is the best description of the siren's motion?Options:(a) It moves from left to right and passes you at $ t = 2 \, \text{s} $.(b) It moves from right to left and passes you at $ t = 2 \, \text{s} $.(c) It moves toward you for 2 s but doesn’t reach you, then reverses direction at $ t = 2 \, \text{s} $.(d) It moves away from you for 2 s, then reverses direction and moves toward you but doesn’t reach you.(e) None of the above are correct.**Graph Explanation:**The graph displays frequency $ f $ on the y-axis and time $ t $ in seconds on the x-axis. The frequency is $ f_0 $ at $ t = 0 $, increases before $ t = 2 $ seconds, then drops sharply back to $ f_0 $ after $ t = 2 $ seconds, remaining constant thereafter.

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