(a) Using the correspondence XXXXXXXXXX XXXXXXXXXX XXXXXXXXXX XXXXXXXXXX j k l n m s t u w x g h i o p q r v y z a b c d e f space find the numerical equivalent of the message BUY ALL AVAILABLE STOCK...

(a) Using the correspondence
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
j k l n m s t u w x g h i o p q r v y z a b c d e f space
find the numerical equivalent of the message
BUY ALL AVAILABLE STOCK AT MARKET.
(b) Encode the message by postmultiplying the message
matrix M by
A  °
1 1 0
1 0 1
1 1 1
¢ .
(c) Verify your work by decoding the encoded message in
part (b).