Benzonitrile $(C_6H_5CN)$ is reduced to two different products depending on the reducing agent used. Treatment with lithium aluminum hydride followed by water forms $\textbf{K}$, which has a molecular ion in its mass spectrum at 107 and the following IR absorptions: 3373, 3290, 3062, 2920, and 1600 $cm^{-1}$. Treatment with a milder reducing agent forms $\textbf{L}$, which has a molecular ion in its mass spectrum at 106 and the following IR absorptions: 3086, 2850, 2820, 2736, 1703, and 1600 $cm^{-1}$. $\textbf{L}$ shows fragments in its mass spectrum at $m/z$ = 105 and 77. Propose structures for $\textbf{K}$ and $\textbf{L}$ and explain how you arrived at your conclusions.