Pls draw and explain the structures of tert and neo pentane. Which degree of carbon is iso, sec tert and neo

Pentane exist in three isomeric form. The names and structures are given below:

n-pentane: terminal carbon atoms are 1$°$ carbon atom that is carbon attached to only one carbon atom and other carbon atoms are 2​$°$ or secondary carbon atoms that is attached to 2 carbon atoms.
isopentane: The second carbon atom is attached to 3 carbon atoms. Hence called as tertiary or 3​$°$ carbon atom.
neopentane: The central carbon atom is attached to 4 carbon atoms. Hence called as quaternary or neo or 4​$°$ carbon atom.