40 points, please help I seriously cannot fail this class and I am extremely confused. All you have to do is solve using dimensional analysis. If you can type some form of work that would be helpful. I will go answer a question on yours as well also.

the answer to the first is 5.5 meters :)

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.