trolls2 hw8 item1

PART A:

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@DIV{μ@Sub{0}I@Sub{1}I@Sub{2}a@Sup{2};2π(d@Sup{2}-@DIV{a@Sup{2};4})}
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PART B:

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@DIV{μ@Sub{0}I@Sub{2}m;2π(d@Sup{2}-@DIV{a@Sup{2};4})}
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