roof hip

Is it okay to extend a hip by extending the jack rafters up onto the new ridge board or Should the jack rafters above the hip board be removed back to the full common rafter and then replace them with full common rafters tied back the the lower jack rafters ? From this photo (purely...

Hi, I'm attempting to tile a hip roof. What i can't work out is that some of the tiles when cut are not able to sit on a batten so just kinda rest on the overlap from the tile to the right. Inevitably they will slip so there must be some way of clipping these in place to prevent the tiles from...