b$)$ Decryption in Vigen$$re cipher is performed by going to the row in the tableau

corresponding to the key, finding the position of the ciphertext letter in this row, and

then using the column's label as the plaintext. Using this information, and assuming

that the key phrase is birthday $($which is used repeatedly to make the key if the

message$),$ decrypt the ciphertext: KIENHUY RXMEMF IIPTB $($ignore spaces while

doing your analysis$)$