Some respondents were approached directly by the team whilst others volunteered after seeing a call for respondents on social media (LinkedIn).
Fe wnaeth y tîm gysylltu'n uniongyrchol â rhai ymatebwyr tra bod eraill wedi ymateb o'u gwirfodd ar ôl gweld galwad am ymatebwyr ar y cyfryngau cymdeithasol (LinkedIn).