A particle starts from the origin at $(t = 0 \, \text{s})$ with a velocity of $(10 \, \hat{j} \, \text{m/s})$ and moves in the x-y plane with a constant acceleration of $(8 \, \hat{i} + 2 \, \hat{j}) \, \text{m/s}^{2}$. At an instant when the x-coordinate of the particle is 16 m, the y-coordinate of the particle is: