Create and save list selection for list of entries in a repeating group cell

how do i create a custom state so that I can select the radio button in the repeating groups cell which has a list of 4 answers,

i have created two RG one to show the fields in my database and one to show the list of entries in my cell, but im finding it very hard to create and save the list selection through custom states, there are youtube videos which show the idea for user list,

many thanks