Identify (Z) in the following reaction.

$$\mathrm{C{H_3}COOH\buildrel {LiAl{H_4}} \over \longrightarrow (X)\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{573\,K}^{Cu}} (Y)\buildrel {dil.\,NaOH} \over \longrightarrow (Z)}$$

The total number of products formed in the following reaction sequence is

$$\begin{gathered}\mathrm{CH}_3 \mathrm{COCl} \stackrel{\text { (i) }\left(\mathrm{CH}_3\right)_3 \mathrm{Cd}}{\longrightarrow}(P) \\ (P)+\mathrm{CH}_3 \mathrm{CHO} \stackrel{\text { (ii) } \mathrm{NaOH}(a q), \Delta}{\longrightarrow} \text { ? }\end{gathered}$$