AP ICET 2019 Shift 1 Paper

Coding and Decoding Problems In a certain code ${\mathit{n}}^{\left(\mathit{t}\mathit{h}\right)}$ letter of the English alphabet is coded as ${\left(\mathit{n}+10\right)}^{\left(\mathit{t}\mathit{h}\right)}$ letter cyclically. The reverse process is used for decoding, with this information answer the following questions