On W2- Curvature Tensor N(k)-Quasi Einstein Manifolds

We consider N(k)-quasi Einstein manifolds satisfying the conditions R(E,X).W2 = 0, W(E,X).S = 0, P(E,X).W2 = 0, where W2 and P denote the W2 -curvature tensor and projective curvature tensor, respectively.