\textbf{156-} A moving object's velocity vector on a plane is $\vec{V}_1 = 2\vec{i} - 5\vec{j}$, and after 5 seconds it becomes $\vec{V}_2 = 17\vec{i} + 10\vec{j}$ (in SI). What is the magnitude of the average acceleration during this time interval (in meters per second squared)?
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(1) $3\sqrt{2}$ \hfill (2) $5\sqrt{2}$ \hfill (3) $3$ \hfill (4) $5$
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