Draw the tetra-ethyl analog of 2,2-dimethylpropane as discussed in A Word About . . . Isomers-Possible and

Question:

Draw the tetra-ethyl analog of 2,2-dimethylpropane as discussed in "A Word About . . . Isomers-Possible and Impossible" on page 55. What is the correct IUPAC name for this compound? Make models of this compound and 2,2-dimethylpropane and compare how sterically congested they are.