Draw the line structure of the alkane described: A 6-carbon branched-chain alkane with two tertiary carbon atoms. Provide the IUPAC name.

Line structure of 3,4-dimethylhexane, a 6-carbon branched alkane.

Line structure of 2,3-dimethylbutane, a branched alkane with 5 carbons.

Line structure of 2,2-dimethylbutane, a branched alkane with 5 carbons.

Line structure of 2,2,3,3-tetramethylbutane, a branched alkane with 10 carbons.