6. For the point with spherical coordinates $(\rho, \theta, \phi) = (4, 3\pi/4, \pi/3)$, determine its rectangular (Cartesian) coordinates.
A. $(\sqrt{3}, \sqrt{3}, 2)$
B. $(-\sqrt{3}, \sqrt{6}, 2)$
C. $(-\sqrt{6}, -\sqrt{3}, 4)$
D. $(\sqrt{6}, -\sqrt{3}, 4)$
E. $(-\sqrt{6}, \sqrt{6}, 2)$