4. (3 points) Assume we have a toy block cipher, called TOY that encrypts blocks of 5 bits. The encryption is as follows:
TOY($b_1b_2b_3b_4b_5$) = $b_4b_2b_1b_5b_3$
Encrypt the message x = 01101 11011 11010 00110 with the three different modes of operation ECB, CBC, and CTR, and provide the corresponding ciphertext y. Use IV (or ctr) = 11001 as initialization vector.