3. (15 points) Cryptanalyze the following ciphertext (Determine the type of cipher, key, and the plaintext):

MYJMYX JWFTEN SYMXYS FWJSYD JYKFPY DXFMWY JGSNYJ AFNNFJ XINQUD JIXTNF JFNSTJ IXHTDT HFKGWY FYYTTJ MQNJSH NPJRTX QSZFJU DNWIFV GWFKKJ RYYFNM JJSWFN JDDIFI USFBLS PFMXZH IFMTHK FTQOMD FWQSRV WFBJJU NUDLYY YYFTIY XYHJJS JJYISK WRIDYZ JJYQHT WNHLYW QHFNTV JDDNMY YDQWFS NFJYTF QNSIMF IRXSNT TXSQJX IWLUNX JYSSSH UFHJQV WQHKWH HSHNSZ XYJKXS ZLZDRM WTJWZB NQLHNJ SNIFIJ SXIUIY JYTNHV