Answer:
(3, -5)
T=(0,6) Midpoint = (3, -2)
use the Midpoint formula:
(X1 + X2)/2=X
(Y1 + Y2)/2=Y
(0 + X2)/2=3
X=3
(6 + Y2)/2= -2
3 + Y2 = -2
Y= -5