Answer
$D = 4.4~\hat{i}+0.9~\hat{j}$
Work Step by Step
$D_x = 2A_x+B_x$
$D_x = (2~m)~sin(15^{\circ})+(4~m)~cos(15^{\circ})$
$D_x = 4.4~m$
$D_y = 2A_y+B_y$
$D_y = (2~m)~cos(15^{\circ})-(4~m)~sin(15^{\circ})$
$D_y = 0.9~m$
$D = 4.4~\hat{i}+0.9~\hat{j}$
