On nodal analysis

\begin{aligned} \frac{V-16}{2}+\frac{V}{2}-8 & =0 \\ V & =16  V \end{aligned}

\begin{aligned} P_{8  A } & =32 \times 8=256  W \text { (Deliver) } \\ P_{2  \Omega} & =16 \times 8=128  W \text { (Absorb) } \\ P_{2  \Omega} & =16 \times 8=128  W \text { (Absorb) } \\ P_{16  V } & =0 \times 16=0  W \end{aligned}