please help with all 3!!

Select only individual atoms, and not the bonds between them. A cumulene has double bonds directly connected to each othec Identify all the atoms that must lie in the same plane in the molecule shown below: Select only individual atoms, and not the bonds between them. Double bonds may be conjugated, meaning that there is one single bond between them. Identify all the atoms in the structure below that must lie in the same plane. Select only individual atoms, and not the bonds between them, In the structureshown below, identify all the atoms that must lie in the same plane