Yvette encoded a secret phrase using matrix multiplication. Using A = 1.B = 2. C = 3, and so on, she multiplied the clear text

code for each letter by the matrix Cu

t

to get a matrix that ventes

to get a matrix that represents the encoded text. The matrix representing the

2

4873114 30 136 78 35

encoded text is

(21 32 50 1358 35 15

decode the text

What is the secret phrase? Determine the location of spaces after you

O FIND THE PRODUCT

O FIND THE INVERSE

O FINE IS THE PIANO

O FINE IS A WARM DAY