.  7.1.1 JavaScript with HTML I dont understand what is wrong with this challenge activity .

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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7.1.1 JavaScript with HTML
I dont understand what is wrong with this challenge activity . 
 

Full explain this question and text typing work only     
We should answer our question within 2 hours takes more time then we will reduce Rating Dont ignore this line

Use the writeln() method of the document object to display the user agent in a <p> tag in the webpage. Hint: The userAgent
property of the window.navigator object contains the user agent.
1 <h1>Demo</h1>
2 kscript>
3
document.writeln('<p> + window.navigator.userAgent + '</p>
4 let platform-window.navigator.platform;
5 </script>
document.writenln("<p>Platform: "+(platform);
Check
Try again
* Error: (line 2) Uncaught SyntaxError, Invalid regular expression: missing /. The code editor above may provide more details for
this error
Transcribed Image Text:Use the writeln() method of the document object to display the user agent in a <p> tag in the webpage. Hint: The userAgent property of the window.navigator object contains the user agent. 1 <h1>Demo</h1> 2 kscript> 3 document.writeln('<p> + window.navigator.userAgent + '</p> 4 let platform-window.navigator.platform; 5 </script> document.writenln("<p>Platform: "+(platform); Check Try again * Error: (line 2) Uncaught SyntaxError, Invalid regular expression: missing /. The code editor above may provide more details for this error
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