Give the mechanisms of aldol reaction (s) that occurs in the following transformation

The number of aldol reaction(s) that occurs in the given transformation is

The number of aldol reaction(s) that occurs in the given transformation is

The number of aldol reaction(s) that occurs in the given transformation is

The number of adol reaction (s) that occurs in the given transformation is

The number of aldol reaction (s) that occurs in the given transformation is CH_3CHO+4HCHOoverset(conc.NaOH)rarr

Give mechanism of this reaction.

Give mechanism of this reaction.