Read the excerpt from The Boy Who Harnessed the Wind by William Kamkwamba.

I didn't have a drill, so I had to make my own. First I heated a long nail in the fire, then drove it through a half a maize cob, creating a handle. I placed the nail back on the coals until it became red hot, then used it to bore holes into both sets of plastic blades. I then wired them together. I didn't have any pliers, so I used two bicycle spokes to bend and tighten the wires on the blades.

What do the details in the excerpt reveal about Kamkwamba?

He is inventive and resourceful.
He disregards others’ property.
He is irresponsible and reckless.
He is careful when using tools.