Identify the starting material and predict the products of the reduction of 4-oxopent-2-enal using Na/NH3 and LiAlH4, detailing the steps involved.

The starting material is 4-oxopent-2-enal, which has the structure $\text{CH}_3-\text{CH}=\text{CH}-\text{CH}_2-\text{CHO}$. This molecule contains two reducible functional groups: an alkene ($\text{C}=\text{C}$) and an aldehyde ($\text{CHO}$). The products will vary depending on the selectivity of the reducing agent used.

• a) Using Na/NH$_3$ (Birch reduction) Sodium in liquid ammonia is a selective reducing agent that typically reduces carbon-carbon double bonds in $\alpha, \beta$-unsaturated carbonyl compounds. It will reduce the alkene group but leave the aldehyde group intact.

  Step 1: Identify the reducible