Question $2(10$ points$)$

A$.$ Circle all possible Michael donors $($molecules that can act as nucleophiles in a Michael

addition$)$ in the following list of molecules. $(5$ points$)$

$(C{H}_3{)}_2$CuLi

B$.$ Which of the following products is not a possible product when the crossed aldol

addition reaction shown below is carried out? $(5$ points$)$