a$)$ Given Cipher text is Newyork. Ceasar cipher key is $31.$ Please find the Plain text for given cipher text using Ceasar algorithm

b$)$ In the given S box, what would be the input for $1000?$

$[2+2=4$ marks$]$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$00$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$0$

$1$

$4$

$7$

$10$

$2$

$5$

$8$

$11$

$3$

$6$

$9$

$12$