An RSA Cipher Has Public Key Pq = 65 and E

Essay

An RSA cipher has public key pq = 65 and e = 7.
(a) Translate the message YES into its numeric equivalent, and use the formula $C = M ^ { e }$ (mod pq) to encrypt the message.
(b) Decrypt the ciphertext 50 16 and translate the result into letters of the alphabet to discover the message.