Triangle RAD is reflected over the x-axis to form triangleR'A'D' (not shown). Then triangle R'A'D'is

translated to form triangle R" A"D"(not shown). Point A" is shown plotted on the xy-plane after the second

transformation. Determine the coordinates of D"?

OD" (7,2)

O D" (9,-10)

OD" (4,-2)

OD" (7-10).