If the basic size of the diameter of a shaft is 75 mm and a unilateral upper variation limit of +0.02 mm is given (with lower limit being 0), then its tolerance in mm is:

If the basic size of the diameter of a shaft is 75 mm and a unilateral variation limit of +0.02 mm is given (with lower deviation being 0), then its tolerance in mm is:

When the upper deviation is +0.15 mm and the lower deviation is -0.05 mm, what is the tolerance on the part?