Answer:
index.html:
<!DOCTYPE html>
<html>
<head>
<title>Brainly</title>
<link href="style.css" rel="stylesheet" type="text/css" />
</head>
<body>
<table id="myTable">
<caption>Duty Roster for last two days</caption>
<tr><th>Day</th><th>Morning</th><th>Afternoon</th></tr>
<tr><td>Monday</td><td colspan="2">John</td></tr>
<tr><td>Tuesday</td><td rowspan="2">Tom</td><td>Peter</td></tr>
<tr><td>Wednesday</td><td>simon</td></tr>
</table>
</body>
</html>
<u>style.css:</u>
#myTable {
background-color: Cyan;
border-collapse: collapse;
height: 200px;
width: 500px;
font-size: 20px;
}
#myTable td,th {
border: 2px black solid;
text-align: center;
}
#myTable td:first-child, th {
background-color: lightgray;
font-weight: bold;
}