如图\((a)\),在\(xy\)平面内有两个沿\(z\)方向做简谐振动的点波源\(S_{1}(0,4)\)和\(S_{2}(0,-2).\)两波源的振动图线分别如图\((b)\)和图\((c)\)所示\(.\)两列波的波速均为\(1.00m/s.\)两列波从波源传播到点\(A(8,-2)\)的路程差为 ______ \(m\),两列波引起的点\(B(4,1)\)处质点的振动相互 ______ \((\)填“加强”或“减弱”\()\),点\(C(0,0.5)\)处质点的振动相互 ______ \((\)填“加强”或“减弱”\()\).