At least one of the answers above is NOT correct. 3 of the questions remain unanswered. (1 point) This question concerns block cipher modes. We will use a simple affine cipher, which can be expressed in C as follows. char cipher(unsigned char block, char key) I return (key+11*block)\%256; \} Note that the block size is 8 bits, which is one byte (and one ASCII character). We will work with the fixed key 0x08. corresponding ASCII code. a) Encrypt the plaintext "brownish" using CTR mode. Please enter your answer in hex. (Please do **not" enter an 0x, as this has been done.) 0x b) Encrypt the plaintext "bangs" using ECB mode. Please enter your answer in hex. 0x c) Encrypt the plaintext "dangling" using CFB mode. Please enter your answer in hex. 0x d) Encrypt the plaintext "long" using CBC mode. Please enter your answer in hex. 0x e) Encrypt the plaintext "lowering" using OFB mode. Please enter your answer in hex. 0x