The following is Devin's approximation of an integral using the Trapezium rule:
\[\frac{6}{5}\cdot\left(\left(\frac{3}{5}\right)^{5}+2\cdot\left(\frac{6}{5}\right)^{5}+2\cdot\left(\frac{9}{5}\right)^{5}+2\cdot\left(\frac{12}{5}\right)^{5}+\left(\frac{15}{5}\right)^{5}\right).\]
Which of the following integrals is Devin approximating?

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