Searching for my great grandparents graves

Hello, I am trying to locate the graves of my 4 Irish great grandparents. I have very kindly been sent the death notices in the  newspaper for them which has said which cemetery they are buried in. I would like to see if I can find out where in the cemeteries they are buried as I would like to come back to Ireland and see them and pay my respects. The headstones may even give me more information! They all came from Cork city and died there. 
The information I have for them are as follows:

Daniel Hurley - born 5th March 1877 at 20 Rutland St, Cork. Died 8th Sep 1958 at home, 4 Devonshire Ave, Cork. Buried at Douglas Cemetery, Cork

Julia Hurley (neé Cullinane) - born 1878. Died 14th November 1957 at home, 4 Devonshire Ave, Cork. Buried in Douglas Cemetery, Cork

John Creedon - born 16th Feb 1861. Died 12th July 1939 at Cork District Hospital. At the time of his death he lived at 12 Upper Rope Walk but had lived at Millerd St, Cork for many years before. Buried at Curraghkippane Cemetery, Cork

Ellen Creedon (neé Murphy) - 5th Jan 1865 at 23 Phillips Lane, Cork. Died 11th Nov 1936 at home, 3 St. Nicholas Place, Cork. Buried at Douglas Cemetery, Cork

All 4 of their funeral services were held at SS Peter & Paul’s church, Cork city. 
 

Any help or advise trying to find the actual graves would be much appreciated. 

Kind regards

Claire Hurley