Let's look at an old Roman age encryption scheme. Let's say we intercepted a message from a known Celtic hacker group. W

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Let's look at an old Roman age encryption scheme. Let's say weintercepted a message from a known Celtic hacker group. We knowfrom experience that this group uses the characters from A to Z(all upper case), then a space, and then the numerals from 0 to 9and employs a wrap around (moving left from A gives us 9 and movingright from 9 gives us A). The first leading pairs of letters tellus what the substitution code is using the code phrase "TrudyJones". For example if the first two pairs are uy du the code is 24and 32. This would mean that we move the first 2 letters 4 placesto the right eg. A becomes E), and then the next 3 letters 2 placesto the left (eg. A becomes 8), then 4 places to the right for thenext 2 characters and so on to encrypt the message. a. What is themessage hidden in: dy un XLIT4MK373W1 ? Remember that you will haveto reverse the algorithm (i.e. shift left first then right thenleft etc.) to decrypt the message. Please give the exact message(use the underscore _ to denote any blank spaces in your answer).b. The message is a nickname for an American city. Give the city inupper case. What would be the encrypted version of this city usingthe encryption scheme as the original message (again, use theunderscore to denote any blank spaces in your answer)?
Step by step on how to the decrypt and encrypt part. step bystep on how they find each letter for each section