Three Dimensional Geometry

$(16+7 \lambda) \hat{\mathbf{i}}+(6 \lambda+9) \hat{\mathbf{j}}+\lambda \hat{\mathbf{k}}$

$(16-7 \lambda) \hat{\mathbf{i}}+(6 \lambda-9) \hat{\mathbf{j}}-\lambda \hat{\mathbf{k}}$

$16 \hat{\mathbf{i}}-9 \hat{\mathbf{j}}+\lambda(\hat{\mathbf{i}}-7 \hat{\mathbf{j}}+6 \hat{\mathbf{k}})$

$16 \hat{\mathbf{i}}-9 \hat{\mathbf{j}}+\lambda(6 \hat{\mathbf{i}}-\hat{\mathbf{j}}-7 \hat{\mathbf{k}})$