Yes, They are correct; though the first 3 lines sounds to be Sorani, but the last line sounds to me to be Southern Kurdish (Kalhori). I haven't seen ڒ in any Kurdish writing system. There is ز in Kurdish which is equivalent of z. but if you wanted to know the difference between ڕ and ر , the difference is in their pronunciation; the pronunciation of ڕ is something like rr, but the pronunciation of ر is simply r.

ڒ = Sounds as '' Z '' letter of English while.. ڕ = Sounds as '' R '' letter of English .. ژ = Sounds as '' ZH '' letters together in English .. Examples : /Rozh/ = /ڕۆژ /= means ''Day'' in English /Zer /= /زێڕ /= means ''Gold '' in English