Trapezoidal and Midpoint Rule Error Relationship

Consider the approximation of $\int_{1}^{3} \frac{1}{x^2} dx$ with $n$ uniform subintervals. Let $E_T$ be the error resulting from a trapezoidal sum and $E_M$ be the error resulting from a midpoint Riemann sum. Which of the following equations correctly relates $E_T$ and $E_M$?