Questions: $1.$ Using the Hill cipher with block size $3$ and encryption matrix A $=511131114,($a$)$ encrypt Acadia$$s motto $$In pulvere vinces$$; $($b$)$ decrypt the message $$UWVIKHACQVGI$.2.$ Eve intercepts the following encrypted message sent to Alice by Bob: WUSZIMBKWUSC NAYKXDTHYSC NQZ$.$PBHSGTM Eve knows that Alice and Bob use a Hill cipher with block length $2,$ but she does not know the secret encryption matrix. Eve also knows that Bob begins all of his letters with $$Hello$.$ Decrypt the message.