AES encryption algorithmConsider the following plain text SE$-330-$FINALEXAM

$1-$ Convert this Plaintext to a state matrix:Given the ASCIl values of the plaintext: $83,69,45,51,51,48,45,70,73,78,65,76,69,88,65,77,32,$ and the encryption key ADVANCEDENCRYPTI converted to ASCIl as $65,68,86,65,78,67,69,68,69,78,67,82,89,80,84,73,32$:a$.$What is the length of the key used in this algorithm in bits?b$.$Describe how the AddRoundKey step is performed without showing the output $($results$).$ Use the provided plain text and encryption key$2-$ If the output of SubBytes is $6568866578676968697867828980847332$Perform the ShiftRows stage