find vector sum of forces vctor A and vector B.Magnitude of A=130N and is along vector OA where A is(3,-4,12) and magnitude of vector B is 200N and is along vector PQ where P is (-2,4,7) and Q is (-2,8,10)find vector sum of forces vctor A and vector B.Magnitude of A=130N and is along vector OA where A is(3,-4,12) and magnitude of vector B is 200N and is along vector PQ where P is (-2,4,7) and Q is (-2,8,10)