Which expressions are equivalent to \dfrac{1}{5}\cdot \dfrac{1}{5}\cdot \dfrac{1}{5}\cdot \dfrac{1}{5} 5 1 ​ ⋅ 5 1 ​ ⋅ 5 1 ​ ⋅ 5 1 ​ start fraction, 1, divided by, 5, end fraction, dot, start fraction, 1, divided by, 5, end fraction, dot, start fraction, 1, divided by, 5, end fraction, dot, start fraction, 1, divided by, 5, end fraction