Update README.md

unit02_symmetric/lab/README.md

@@ -15,7 +15,7 @@ Sample answers: [here](https://github.com/billbuchanan/appliedcrypto/blob/master
 | 1 | Log into vSoC 2, and select your Ubuntu host (or your own AWS EC2 instance or virtual machine). | What is your IP address? |
 | 2 | Use: ```openssl list -cipher-commands``` | Outline five encryption methods that are supported:   |
 | 3 | Use: ```openssl version``` | Outline the version of OpenSSL:    |
-| 4 | Using openssl and the command in the form: ```openssl prime -hex 1111``` | Check if the following are prime numbers: |  42 [Yes][No] 1421 [Yes][No] | 
+| 4 | Using openssl and the command in the form: ```openssl prime -hex 1111``` | Check if the following are prime numbers: <br> 42 [Yes][No] 1421 [Yes][No] | 
 | 5 | Now create a file named myfile.txt (either use nano or another editor). Next. encrypt with aes-256-cbc <br> ```openssl enc -aes-256-cbc -in myfile.txt -out encrypted.bin -pbkdf2``` and enter your password. | Use the following command to view the output file: ```cat encrypted.bin``` Is it easy to write out or transmit the output: [Yes][No]. What does the ```-pbkdf2``` part do? | 
 | 6 | Now repeat the previous command and add the –base64 option. <br>```openssl enc -aes-256-cbc -in myfile.txt -out encrypted.bin –base64 -pbkdf2``` | Use the following command to view the output file: ```cat encrypted.bin``` Is it easy to write out or transmit the output: [Yes][No]
 | 7 | Now repeat the previous command and observe the encrypted output. <br>```openssl enc -aes-256-cbc -in myfile.txt -out encrypted.bin –base64 -pbkdf2``` | Has the output changed? [Yes][No] Why has it changed? |