Question 4 For the following matrix, A = -2 First, calculate the cofactors of A, C11 = C12 C13 C21 = C22 C23 C31 = C32 C33 Hence give the adjugate of A, Rows: 3 Columns: 3 adj A = We have: det A = , and therefore Rows: 3 Columns: 3 A-1 (enter your solution with two decimal values precision). Finally, (det A)-1 (mod 17) = , and so, in mod 17 arithmetic, the inverse of A is: Rows: 3 Columns: A-1 (mod 17)