The quality control department at Alexander Fasteners measured the length of 100 bolts randomly selected from a specified order. The mean length was found to be 7.25 cm, and the standard deviation was 0.01 cm. If the bolt lengths are normally distributed, find
(a) The percentage of bolts shorter than 7.24 cm
(b) The percentage of bolts longer than 7.28 cm
(c) The percentage of bolts that meet the length specification of 7.25 ± 0.02 cm
(d) The percentage of bolts that are longer than the nominal length of 7.25 cm
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