Short one

1)  (25 pts) The following is a ciphertext: 
ZQ GDH LMJ XHBIG JODHAC PD CLUJ XZUJF ZO KLMZV LV L GDHOA RLO, PCJO ECJMJUJM GDH AD QDM PCJ MJVP DQ GDHM XZQJ ZP VPLGV EZPC GDH, QDM KLMZV ZV L RDUJLNXJ QJLVP
JMOJVP CJRZOAELG

a)  What kind of cipher text is this? Mono- or Poly alphabetic; [Hint: assume one and when that does not work look for the other] [2 points]

b)  Describe your cryptanalysis process. List all the steps you went through to decrypt the message. The steps should be in sufficient details so that a reader would be able to decrypt the encrypted text without needing any help from you.

[If you find solution online or use online tools please give reference. However, you should describe the steps as if you are working without the tool, (Hint consider starting with the frequency analysis) to get full credit]
[If you list partial steps you will get partial credit]

[15points]
c)  State the plain text message in readable form i.e. separating words if required
[the solution worked without the help from online tools will be given full credit] [2 pts]

d)  List features of the cipher- text that hindered and helped your decryption process. mention of helpful and hindering features [ 6 pts] 
Note: Only a decrypted message even if it is correct one without the methodology and the detailed description of the self-explanatory steps used to decrypt, would not get points.