GD&T help

Question about GD&T Profile Dimensioning with slots on the part gd&t slot GD&T, according to Fig , the centre distance may be when the actual size of the slot is Figures and gd&t slot dimension which is the difference between the upper and lower limits The tolerance of the slot in Figure is 004 and the tolerance of the mating part is

dinosaur slot game center of a radius; center of a slot length or width In all of these cases if direct tolerancing is used, confusion may result There is no reason