Basic text CSS question

Question

I'm taking over the maintenance of someone else's site and I want to add some simple CSS that will create some text that I can apply to areas intended for lots of text to be read.
1.) Would adding the following to the CSS file serve my purpose?
.readingtext {
font-size: 1.2em;
font style: arial
font color: #000
2.) How do I then add the styles to any blocks of text in DW to apply this style?
Thanks in advance.

Answer 1

Yes, I did mean to format some text.
I do not have a link to a page because it is all offline right now.
As an example, this bulleted list is in all bold, and I am not quite sure why, so I wanted to format it differently. There are pages that have text in tables like this, and they do not show up all in bold. How would I apply the new style to this text? Thanks!
</th>
        <th width="149" scope="col"> </th>
      </tr>
      <tr>
        <th height="83" align="left" valign="top" scope="row"><ul>
          <li>            Room 2123          </li>
          <li>             Room 2124          </li>
          <li>            Room 2125          </li>
          <li>            Room 2126          </li>
          <li>           Room 2127         </li>
          <li>            Room 2128          </li>
          <li>            Room 2129         </li>
        </ul></th>