Question 1, 2 And 3
A = [ 2 5 ] is the given matrix.
[ 3 5 ]
1) (2marks) encode the message "TEST".
2)(2marks) find the inverse of A. Note that your matrix entries should be integers in the range 0,...25.
3) (2marks) use your answer above to decode the message "ETAJ"
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- -5 3 a. Use the coding matrix A = to encode the word TOYS. 0 2 1 3 5 10 b. Use its inverse, A to decode 25, 30, -24, 24. 1 O 2 Evaluate the determinant. 28 3 7
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