The IUPAC name of the compound is:

[Image showing the numbering of the carbon chain for 3-ethyl-4,4-dimethylheptane]Select the longest carbon chain. Starting from the ethyl group side (${\text{CH}}_3{\text{-CH}}_2\dots$), the chain length is 7 carbons (Heptane).Numbering: Start from the end closer to the substituents.From left: Substituents at 3 (ethyl) and 4, 4 (dimethyl).From right: Substituents at 4, 4 and 5.Lowest locant set rule gives $3,4,4$.Name: Alphabetical order of substituents.$3\text{-Ethyl-}4,4\text{-dimethylheptane}$.