A list is an R-object that can have a wide range of different items inside of it, including vectors, functions, and even another list.
The head() function lets you display the first observations in a data frame. The method tail() prints the final observations in your data collection in a manner similar to that. Both head() and tail() print a top line called the 'header', which contains the names of the distinct variables in your data collection. The R language's transform() function is used to alter data. The first parameter is transformed into a data frame. A suitable variable name comprises of letters, numbers and the dot or underline characters. The variable name does not begin with a number but rather with a letter or a dot.
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I believe the answer is D, document object model. Conditional Statements deal with if statements, iterative structures are while and for loops, HTML tags are the tags which help to format and define a webpage, and src attribute deal with specifying external sources for certain tags.
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;
}
Answer:
the answer would be B proxy server
1000 people died of an alcohol addiction
