Which words in the sentence are the infinitive?

paul completed many of the repairs and had only a few tasks left to finish.

a.
to finish

b.
and had only

c.
many of the repairs

d.
a few tasks

He lacks confidence in Father’s ability to fix the horseless carriage.

Explanation:

This is the statement that best represents what takes place in this example. In this passage, we learn that the "demon" wants his car to be fixed. He states this much by saying "Garage. Repair my Oldsmobile." However, we also know that he does not think Father can fix it, as he is asking for a garage. He also seems to believe that Father is incapable of understanding him, as he speaks to him loudly and with few words.