Use Playfair eipher to enerypt the plaintext "yellow balloon" using the key resf. $(10$

points$)$

Given two $22$ matrices: $(10$ points$)$

$M=([1,2],[1,1]),N=([-1,2],[1,-1])$

$($a$).$ Verify multiplication of $M$Nmod$26=N$Mmod$26=$I $($identity matrix$)$

$($b$).$ Use Hill cipher to encrypt the message TESTS

Use Row transposition cipher to encrypt the message "symmetric encryption" using the

key $51324,(10$ points$)$