Let \(O\) be the origin in 3D space. If the vertices \(A(2,p,-3),B(q,-2,5)\), and \(C(-5,1,r)\) of a triangle satisfy the vector relation \(\overline{PA}+\overline{PB}+\overline{PC}=3\overline{PO}\) for any point \(P\) in space, then the values of \((p,q,r)\) respectively are ...