Note that, in this context, "invisible" does not imply that the watermark is literally invisible—instead, it means that the watermark is not obvious to the reader. a. Discuss several possible methods...

Note that, in this context, "invisible" does not imply that the watermark is literally invisible—instead, it means that the watermark is not obvious to the reader.

a. Discuss several possible methods the instructor could have used to watermark the manuscripts.

b. How would you solve problem (i)?

c. How would you solve (ii), assuming that you have solved (i)?

d. Suppose that you are unable to solve (i). What could you do that  would likely enable you to solve (ii) without having solved (i)?