Show how hexanal can be synthesized using the starting material given below with any necessary reagent.
Ethyl hexanoate

Hexanal synthesis using KMnO4 and water to convert ethyl hexanoate.

Hexanal synthesis using LiAlH4 and water to convert ethyl hexanoate.

Hexanal synthesis using NaBH4 and water to convert ethyl hexanoate.

Hexanal synthesis using DIBAL-H and water to convert ethyl hexanoate.

Show how hexanal can be synthesized using the starting material given below with any necessary reagent.Ethyl hexanoate