Let me know how I can construct the range and the respective frquencies

for the following problem.( ie <3.5 is 6, 4.0 is 18, and so on)

what would be range for the components 30-(18+6).?

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The diameters of a random sample of 30 mass-produced components were measured by checking their diameters with gauges. Of the 30, 18 passed through a 4.0mm gauge and of these six failed to pass through a 3.5mm gauge. Test the hypothesis that the diameters of the components were a sample of a normal population with mean 3.8mm and the standard deviation .5mm. Use a 5% significance level for your test.