The law of Florida<span> consists of several levels, including constitutional, statutory, and regulatory </span>law<span>, as well as case law and local law. The </span>Florida Statutes<span> form the general statutory law of </span>Florida<span>.</span>
For 4, I’d say the best answer to that would be tradition.
There is no law or amendment set in place that designates the Capitol as the place where inaugurations are to be held.
They probably felt very threatened and aimed to improve defense mechanisms