Amir encoded a secret phrase using matrix multiplication. Using A = 1, B = 2, C = 3, and so on, he multiplied the clear text
code for each letter by the matrix C-
to get a matrix that represents the encoded text. The matrix representing the
1-4
10-26 -49 93 -13 -50
encoded text is
What is the secret phrase? Determine the location of spaces after you
| 16 -33 -63 16 9 -10 -65]
decode the text.