Упростите \((0,4x^3y^4)^2\cdot\frac{1}{8}x^4y\) .

• \(0,02x^{10}y^9\)
• \(0,2x^{10}y^9\)
• \(-0,02x^{10}y^9\)
• \(0,02x^{12}y^9\)