If A=(1,2,3) and B(3,5,7) and P,Q are the points on AB such that AP=PQ=QB, then the mid point of PQ is

If A=(1,2,3) and B(3,5,7) and P,Q are the points on AB such that AP=P

1.	If A=(1,2,3) and B(3,5,7) and P,Q are the points on AB such that AP=PQ=QB, then the mid point of PQ is
Answer» If $A = (1, 2, 3)$ and $B (3, 5, 7)$ and $P, Q$ are the points on $A B$ such that $A P = P Q = Q B,$ then the mid point of $P Q$ is