Hi, <br/><br/>Any help would be great.<br/><br/>1) The conditions Bob LIVE/LIVES in ARE/IS terrible<br/><br/>2) The problems that the researcher FACE/FACES ARE/IS vast.<br/><br/>3) The conditions that the researcher or participant FACES/FACE ARE/IS worrying<br/><br/>4) The conditions that the researcher or participants FACE/FACE ARE/IS worrying<br/><br/>Thanks!