In a musical chair game, the person playing the music has been advised to stop playing the music at any time within $2$ minutes after she startys playing. What is the probability that the music will stop within half a minute after starting?

Question

$\begin{array}{1 1} \large\frac{1}{4} \\ \large\frac{8}{3} \\ \large\frac{4}{7} \\ 8 \end{array}$