For each of the six structural formulas (A through F), shown below, five questions are posed. The answer to each is a number that should be entered in the appropriate answer box.
Note that the sigma-bond question refers only to carbon-carbon bonds, whereas the pi-bond question includes all such bonds between carbon and any other kind of atom.

A	Number of sp3 carbons: ............... Number of sp2 carbons: ............... Number of sp carbons: ................ Number of carbon-carbon σ-bonds: ....... Number of π-bonds to carbon: .............		B	Number of sp3 carbons: ............... Number of sp2 carbons: ............... Number of sp carbons: ................ Number of carbon-carbon σ-bonds: ....... Number of π-bonds to carbon: .............		C	Number of sp3 carbons: ................ Number of sp2 carbons: ............... Number of sp carbons: ................ Number of carbon-carbon σ-bonds: ....... Number of π-bonds to carbon: .............
D	Number of sp3 carbons: .............. Number of sp2 carbons: ............... Number of sp carbons: ................ Number of carbon-carbon σ-bonds: ....... Number of π-bonds to carbon: .............		E	Number of sp3 carbons: ............... Number of sp2 carbons: ............... Number of sp carbons: ................ Number of carbon-carbon σ-bonds: ....... Number of π-bonds to carbon: .............		F	Number of sp3 carbons: ............... Number of sp2 carbons: ............... Number of sp carbons: ................ Number of carbon-carbon σ-bonds: ....... Number of π-bonds to carbon: .............