Centroid Distance from Line Intersection

Let PQR be a triangle with R(−1,4,2). Suppose M(2,1,2) is the mid point of PQ. The distance of the centroid of △PQR from the point of intersection of the line ‌

x−2

0

=‌

y

2

=‌

z+3

−1

and ‌

x−1

1

=‌

y+3

−3

=‌

z+1

1

is