3. (5分) Give an asymptotic upper bound for the function \( \mathrm{T}(\mathfrak{n}) \) where \( \mathrm{T}(\mathfrak{n}) \) satisfies the recurrent equation \( \mathrm{T}(\mathfrak{n}) = 5\mathrm{T}(\mathfrak{n} / 4) + \mathfrak{n} \).