Part one of this thread...upper bound, technically, is 7.4999r. but we've been told to just say 7.5. The lower bound is 6.5.
Part two, similarly the upper bound of 7.5 is 7.54999r, but call it 7.55. The lower bound of 7.5 is 7.45.
Correct me if I'm wrong, but I think that's right.