Two blocks of masses $m_A = 6, 6kg$ and $m_B = 17, 2kg$, resting on a frictionless table, are connected to a stretched (massless) spring and then released (from rest). The system consists of the two blocks and the spring and the net external force on the system is zero. Determine the ratio of the speeds of the blocks, $v_A / v_B = ?$. Express your answer using one decimal place.