Could someone please look up 2 marriage dates for me and one death date please?

It concerns the marriage of Thomas Cowin (b.abt 1716) & Ann Banks (b.abt 1726 & d. 2/9/1797). They had 8 children! I don't have Thomas's death date.

And I also need the marriage date of Robert Cowin (b.abt 1650 & buried 12/8/1723) & Elizabeth Kewley (b.abt 1655 & died 28/10/1713).

All the above in the Onchan environment, to the best of my knowledge.