The locus of the mid point of the line segment joining the point \( (4, 3) \) and the points on the ellipse \( x^2 + 2y^2 = 4 \) is an ellipse with eccentricity:
\( \frac{\sqrt{3}}{2} \)
\( \frac{1}{2\sqrt{2}} \)
\( \frac{1}{\sqrt{2}} \)
\( \frac{1}{2} \)