Explain the changes that would have to be made to the program of Code Fragment 5.11 so that it could perform the Caesar cipher for messages that are written in an alphabet-based language other than...

Fragment 5.11 so that it could perform the Caesar cipher for messages

that are written in an alphabet-based language other than English, such as

Greek, Russian, or Hebrew.

Use standard control structures to compute the sum of all numbers in an

n×n
data set, represented as a list of lists.