Consider a very basic model of Feistel Cipher with two rounds. The function for round i is i(,) = (2 )^x mod 15 , for i=1,2 and K=7. The ciphertext is 00111111. What is the plaintext? Find L0 , R0 , F1 , L1 , R1 , F2, L2 , R2 and write in the box

Ro= F= R = F2- L2= Ra=