please answer all parts of question 3.10 and also explain and show your work of how you got the answer so I can understand it.

3.6 KEY TERMS, REVIEw QUESTIONS, AND PROBLEMs 97 3.10 a. Construct a Playfair matrix the key largest b. Construct a Playfair matrix with the key occurrence. Make a reasonable assump- tion about how to treat redundant letters in the key. 3.11 a. Using this Playfair matrix: M F H K U N O P Q z V W X Y E L A R G D S T B C