Answer:
1. to
2. noun adjective ,adverb
3. adverb (modifies the adjective, 'ready')
Explanation:
By definition, in English infinitives consist of to + verb (that is the form)
Examples of functions (or "role")
Noun: "<u>To be</u> or not <u>to be</u>: that is the question." <u>To educate</u> is my goal.
Adjective: We showed them the way <u>to go</u>. The path <u>to follow</u> begins near the old well.
Adverb: My friends were eager <u>to see</u> the play. We strained <u>to hear</u> the dialog.