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Activity 1 ( Unlock a coded message ) Doctor Strange is in deep trouble. He is being pursed by Thanos and is presently hiding in

Activity 1(Unlock a coded message)
Doctor Strange is in deep trouble. He is being pursed by Thanos and is presently hiding in a secret
location to escape from being captured by him. He needs to send messages to two of his comrades,
Thor and Captain America, to tell them about his situation and whereabouts. As such, he composes
his first message by replacing each letter in the message by a number according to the code in
Table 1 below.
Table 1: Coding system
As Doctor Strange is afraid that his message will be intercepted and cracked by Thanos, therefore,
he decides to send the message in code together with a super hi-tech LOCK to Thor and Captain
America to unlock the coded message.
LOCK=[101-110012]
With the use of Table 1 and LOCK, what is the message that Doctor Strange is trying to send to Thor
and Captain America? Please show your working clearly on how you unlock the code message. Activity 2(Design your own substitution cipher)
(a) Use the criteria indicated to create a pair of 33 matrices (D&D-1), where the entries
of the matrix D are all integers.
(20 marks ) Hi, can you explain each step of your working and how you derived the ans in extreme details. Thanks
(i)d2,1=5
(ii)d3,2=-2
(b) Create your own substitution cipher. Then use it and the matrix D you created in (a) to
encrypt the title of your favourite movie.
(20 marks )
(c) Use the matrix D-1 and the appropriate substitution cipher to decrypt the message from
(b).
(20 marks )
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