1 $\begin{array}{*{20}{c}}
{C{H_3} - CH - C{H_2} - COOH} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{Cl\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}
\end{array}$
2 \(CH -CH -CH -COOH\)
3 $\begin{array}{*{20}{c}}
{C{H_3} - C{H_2} - CH - COOH} \\
{\,\,\,\,\,\,|\,} \\
{\,\,\,\,\,\,Cl}
\end{array}$
4 All are of equal strength