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2. Demonstrate how to use Excel to encrypt or code a message using matrices and their inverse. Example: The message to be encoded is SEPTEBMER IS HERE The encoded message to be formed using triplets of numbers and the 3x3 matrix A = 0 0 whose inverse is 3 1 51 -2011 A-1 0 0 = -13 1-5 2 0 1 Use the following association of letters and divide the message into triplets of letters: SEP TEM BER ISH ERE A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 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 Now multiply the matrix A times each column vector of the message. You will receive the coded message. To decode the message, form 3x1 column vectors of the numbers in the coded message and multiply on the left by A