Centroid Coordinates and Line Intersection

Let $P(3 \cos \alpha, 2 \sin \alpha), \alpha \neq 0$, be a point on the ellipse $\;\dfrac{x^{2}}{9}+\;\dfrac{y^{2}}{4}=1, Q$ be a point on the circle $x^{2}+ y^{2}-14 x-14 y+82=0$ and R be a point on the line x + y = 5 such that the centroid of the triangle PQR is $\left(2+\cos \alpha, 3+\;\dfrac{2}{3} \sin \alpha\right)$. Then the sum of the ordinates of all possible points R is: