\textbf{160-} A particle moves with constant speed along the x-axis and passes through the origin at moments $t_1 = 3\,\text{s}$ and $t_2 = 5\,\text{s}$, and at the moment that it reaches the position $x = -1\,\text{m}$, the direction of motion reverses. The average speed of the particle from moment $t_1 = 0\,\text{s}$ to $t_2 = 5\,\text{s}$ is how many meters per second?
$$\frac{13}{5} \ (1) \qquad\qquad 3 \ (2) \qquad\qquad \frac{17}{5} \ (3) \qquad\qquad 6 \ (4)$$
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