7. A shouldered screw contains three hollow right circular parts on the screw before a nuts is tightened against the shouldered. To sustain the function, the gap co must equal or exceed 0.08mm. The parts in the assembly depicted in Fig.1 have dimensions and tolerances as follows: b=19.05+0.02mm c-3.05+0.13mm d=22.23+0.02mmAll parts except the part with the dimension d are supplied by vendors. The part containing the dimension d is made in-house. (a) Estimate the mean and tolerance on the gap o.(b) What basic value of d will assure a 44.500.08mm