Please help me with the following question. Please be as specific as possible, thank you.

Consider three matrices: > A := {(1, 13, 12, 10)|(3, 11, 7, 1)|(5, 2, 17, 1)|(5, 7, 14, 5)); B:= ((6, 2, 1, 1)|(3, 3, 3, 15)|(1, 5, 3, 2)|(3, 1, 4, 5)); C:= {(2, 1, 3)|(2, 2, 1)|(10, 1, 2)); 1 3 5 5 13 11 2 7 12 7 17 14 10 1 1 5 6 313 2 3 5 1 B:= 1 3 34 | 1 15 2 5 2 2 10 C:=| 1 2 1 (2.1) (A) Chose one of these matrices that can be used for Hill cryptosystem encryption of the sentence "GOOD CHOICE" based on the following 27 character-to-digits conversion table | 1 2 3 4 5 6 7 8 9 "A" "B" "C" "D" "E" "F" "G" "H" "I" 10 11 12 13 14 15 16 17 18 "J" "K" "L" "M" "N" "O" "P" "Q" "R" 19 20 21 22 23 24 25 26 27 "S" "T" "U" "V" "W" "X" "Y" "Z" "" Explain your choice. (B) Perform encryption of the given sentence. Use the number 27 for encoding the space "_" between words. (C) Perform now decryption of the encripted text. Consider three matrices: > A := {(1, 13, 12, 10)|(3, 11, 7, 1)|(5, 2, 17, 1)|(5, 7, 14, 5)); B:= ((6, 2, 1, 1)|(3, 3, 3, 15)|(1, 5, 3, 2)|(3, 1, 4, 5)); C:= {(2, 1, 3)|(2, 2, 1)|(10, 1, 2)); 1 3 5 5 13 11 2 7 12 7 17 14 10 1 1 5 6 313 2 3 5 1 B:= 1 3 34 | 1 15 2 5 2 2 10 C:=| 1 2 1 (2.1) (A) Chose one of these matrices that can be used for Hill cryptosystem encryption of the sentence "GOOD CHOICE" based on the following 27 character-to-digits conversion table | 1 2 3 4 5 6 7 8 9 "A" "B" "C" "D" "E" "F" "G" "H" "I" 10 11 12 13 14 15 16 17 18 "J" "K" "L" "M" "N" "O" "P" "Q" "R" 19 20 21 22 23 24 25 26 27 "S" "T" "U" "V" "W" "X" "Y" "Z" "" Explain your choice. (B) Perform encryption of the given sentence. Use the number 27 for encoding the space "_" between words. (C) Perform now decryption of the encripted text