Instructions
In a certain code, $$n^{th}$$ letter of the English alphabet is called as $$r^{th}$$, where $$n + 12 = 26m + r$$ such that m and r are integers and $$0 \leq r \leq 25$$ and when r = 0, $$r^{th}$$ letter is treated as 'z'. For example the $$5^{th}$$ letter E is-coded as $$17^{th}$$ letter Q. N as Z and R is coded as, D , The reverse process is used for decoding. Use these to answer questions
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