Using the english alphabet (i. e., mod 26 arithmetic) let plaintext = {p1, p2, pn} and corresponding cipher text = {c1, c2, cn}. suppose the encryption function is ci = pi + 10 (mod 26). you receive the cipher text message ewem sc k qbokd cmryyv what are the decryption function, and the decrypted/recovered plaintext? what type of cipher is this? show your calculations.