$-$Elimination $($alpha$)$ shares many characteristics with $-$elimination and is one approach for the formation of singlet carbenes.

a$.$ Using your skills in "searching and finding" provide a brief $(1$ sentence$)$ definition of a singlet carbene.

b$.$ Using the template of the box above, draw curved arrows $($mechanistic arrows$)$ to account for the reaction scheme depicted.

c$.$ Name the orbital$($s$)$ that the carbene electrons are found in the product $-$ in this case please provide the orbital hybridization where appropriate. Provide a brief explanation $(1$ sentence$)$ how$/$why the curved arrow mechanism you provided in $3b$ is in agreement with your response.