1)

2)

Part (a):
Part (b):
3)

Part (a):
Part (b):
Part (b) - Critical value method:
4)

Part (a):
Part (b):
Part (c):
5)

Part (a):
Part (b):
Part (c):
Part (d):
6)

7)

Part (a):
Part (b):
Part (c):
8)

Part (a):
Part (b):
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