The superlative for willing would be "most willing." There is no one-word superlative.
Willing, more willing, most willing.I am willing to help you.Barbara is more willing to help you.Fiona is most willing to help you.
Sleep is a noun and does not have a superlative. Sleepy is an adjective and the superlative is "sleepiest."
In this case you would say more willing (comparative) and most willing (superlative).
"Studying" is not a superlative, as it is not an adjective. "Most studious" is a superlative of "studious."
"Bib" is a noun and, as such, does not have a superlative form.
Tallest is the superlative.
superlative of quiet
most superlative is the superlative form of superlative
bigger is the comparativebiggest is the superlative
smallest is the superlative. (est is the standard superlative ending._
The superlative of clear is clearest.
Fattest is the superlative of fatter.