Upon reviewing the bootstrap4 documentation, it appears that there are structural issues in your code. It is advisable to refer back to the documentation first to ensure the correct formatting before attempting to incorporate JavaScript for added functionalities. Below is an example relevant to your inquiry.
Furthermore, it is recommended to segregate JavaScript and CSS into their respective files.
Disclaimer: This example is sourced from www.w3schools.com.
.carousel-inner img {
width: 100%;
height: 100%;
}
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="c7a5a8a8b3b4b3b5a6b787f3e9f1e9f6">[email protected]</a>/dist/css/bootstrap.min.css">
<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="2b415a5e4e59526b18051d051b">[email protected]</a>/dist/jquery.slim.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="58283728282d3a76221b186976696e7669">[email protected]</a>/dist/umd/popper.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="cdafa2a2b9beb9bfacbd8df9e3fbe3fc">[email protected]</a>/dist/js/bootstrap.bundle.min.js"></script>
<div id="demo" class="carousel slide" data-ride="carousel">
<!-- Indicators -->
<ul class="carousel-indicators">
<li data-target="#demo" data-slide-to="0" class="active"></li>
<li data-target="#demo" data-slide-to="1"></li>
<li data-target="#demo" data-slide-to="2"></li>
</ul>
<!-- The slideshow -->
<div class="carousel-inner">
<div class="carousel-item active">
<img src="https://www.w3schools.com/bootstrap4/ny.jpg" alt="Los Angeles" width="1100" height="500">
</div>
<div class="carousel-item">
<img src="https://www.w3schools.com/bootstrap4/chicago.jpg" alt="Chicago" width="1100" height="500">
</div>
<div class="carousel-item">
<img src="https://www.w3schools.com/bootstrap4/la.jpg" alt="New York" width="1100" height="500">
</div>
</div>
<!-- Left and right controls -->
<a class="carousel-control-prev" href="#demo" data-slide="prev">
<span class="carousel-control-prev-icon"></span>
</a>
<a class="carousel-control-next" href="#demo" data-slide="next">
<span class="carousel-control-next-icon"></span>
</a>
</div>