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Children's gross motor development is assessed with an overall motor quotient, MQ, which follows an approximate normal distribution, with mean 100 and standard deviation 15. The following MQs are all above average; find their z-scores and characterize each as being exceptional, borderline, or unexceptional, if we decide to call the MQ "exceptional" if it is considerably more than 2 standard deviations above the mean, "borderline" if it is close to 2 standard deviations above the mean, and "unexceptional" otherwise.

a. MQ = 117

b. MQ = 144

c. MQ = 132

d. MQ = 129 7

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