Identify the end product \(Z\) in the given sequence of reactions
\[
C_3H_6
\xrightarrow[\left(C_6H_5COO\right)_2]{HBr}
X
\]
\[
X
\xrightarrow[\text{Anhy. }AlCl_3]{C_6H_6}
Y
\]
\[
Y
\xrightarrow[(iii)\ NaOH/CaO,\Delta]{(i)\ KMnO_4/OH^- \;\; (ii)\ H_3O^+}
Z
\]