If \({\rm{a\;}} + {\rm{\;}}\frac{1}{{\rm{a}}}{\rm{\;}} = {\rm{\;}}3,\) then \(\left( {{{\rm{a}}^4}{\rm{\;}} + {\rm{\;}}\frac{1}{{{{\rm{a}}^4}}}} \right)\) is equal to:

1
77
2
81
3
47
4
27

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