title: Changing the numberings of nested lists in an Enumerate environment, in LaTeX
body: <p>I want to produce the following in LaTeX:</p>
  
  <pre><code>1. Item
      2. Item
      3a. Item
      3b. Item
      4. Item
  5. Item
  </code></pre>
  
  <p>Basically I have already tried using nested <code>enumerate</code> environments, but I have a problem with implementing the different numberings.</p>
  
  <p>How can I do the above in LaTeX?</p>