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Hi again,

1)

z = 0.816 for 80th percentile so,

z = (x - 63.2)/2.81 = 0.8416

x = 65.56

2)

z = -0.6745 for first quartile so,

z = (x - 63.2)/2.81 = -0.6745

x = 61.30

Let me know if you have any questions.