What is ${\left( 8^{-2} \right)^{-5}}$

${8^{ -7 }}$ ${\frac{1}{32768}^{ 10 }}$ ${\frac{1}{32768}^{ -7 }}$ ${\frac{1}{32768}^{ - \frac{1}{32} }}$ ${8^{ 10 }}$ ${8^{ - \frac{1}{32} }}$