The figure shows the ______ and _____ Moon phases. 
Definitions:
Newman Projection
A method of visualizing the conformation of a chemical compound by projecting its bond structure along a chosen bond axis.
Anti Conformation
A spatial arrangement in molecules where substituents on adjacent carbons are positioned as far apart as possible, reducing steric strain and often seen in Newman projections.
Butane
A saturated hydrocarbon with the formula C4H10, consisting of four carbon atoms linked in a straight chain or branched.
C3-C4 Bond
In organic chemistry, the covalent bond between the third and fourth carbon atoms in a carbon chain.
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