How do I combine the following fetch_rss statements?

After reading the following two posts…

https://www.ads-software.com/support/topic/94468
https://www.ads-software.com/support/topic/73410

…I came up with the following code to output the latest RSS headline with a time stamp and short excerpt followed by four headlines only (no excerpt or timestamp).

<?php require_once(ABSPATH . WPINC . '/rss-functions.php');
$rss = fetch_rss('https://www.website.com/rss.xml');
for($i=0;$i<1;$i++) {
$item=$rss->items[$i];
$pubdate=substr($item['pubdate'], 0, 16);
echo '<p><a href="'.$item['link'].'" title=" '.$item['title'].'">
<b>'.$item['title'].'</b></a><br><i>'.$pubdate.'</i>
<br>'.$item['description'].'<a href="'.$item['link'].'">
more...</a></p>';
}
<?php require_once(ABSPATH . WPINC . '/rss-functions.php');
$rss = fetch_rss('https://www.website.com/rss.xml');
for($i=1;$i<5;$i++) {
$item=$rss->items[$i];
echo '<li><a href="' . $item['link'] . '" title="' . $item['title'] . '">' . $item['title'] . '</a></li>';
}
?>

This spits out the following:

RSS Latest Headline
– time stamp
– excerpt
2nd Most Recent Headline
…
5th Most Recent Headline

Is there anyway to combine the two fetch_rss statements so that I don’t have to call the RSS feed twice but still achieve the same output?

Thanks!