Below are three simple ciphers for you to solve.
Message One
UJTUQJ FQQ FWTZSI YMJ BTWQI QNPJ YT XTQAJ UZEEQJX.
Message Two
MIGY JOTTFYM WUH VY BULX NI MIFPY, VON MIGY ULY YUMS.
Message Three
QVQ LBH GUVAX GUNG GUVF CHMMYR JNF UNEQ BE RNFL GB QB?