li><p>Use <code>st_filter</code> to find all the cities in the dataset that are within Larimer County.</p></li>
<li><p>Plot the cities and the county boundary on a single map. Use <code>geom_sf()</code> to plot both layers and make sure to set the <code>fill</code> and <code>color</code> arguments appropriately.</p></li>
<li><p>Next, determine the <strong>three</strong> cities in Larimer County with the highest population and add these to the map. Use a larger point size and a different color for the points