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Encrypt the message “Cancel Contract” using an alphanumeric Caesar cipher with shift 16 (mapping A to Q).

Decrypt the message “RJJY NSAJ SNHJ” if it was encrypted using an alphabetic Caesar cipher with shift 5 (mapping A to F).

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Original: ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789
Maps to: HLCO2BQF5WRTZN1G4D8IJ6SUVK3A0X9YME7P
Use the substitution mapping to encrypt the message “Attack at Sunrise”

Original: ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789
Maps to: HLCO2BQF5WRTZN1G4D8IJ6SUVK3A0X9YME7P
Use the substitution mapping to decrypt the message “Z22 IHI3 YX3”

Compute 15 mod 4

Compute 10 mod 5

Compute 257 mod 11

Compute 86 mod 13

Complete the following table or upload a screenshot of your completed table from this website.

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