Please think through carefully, the last expert gave the wrong information, Thank you as always!!

${\displaystyle \underset{-5}{\overset{0}{}}}(2x-5)dx$

a$)$ Find a formula to approximate the above integral using $n$ subintervals and using Midpoint Rule. $((i-\frac{1}{2})*\frac{2}{n}{)}^2-54($enter a formula involving $n$ alone$).$

b$)$ Evalute the formula using the indicated $n$ values.

$n=10$:

$n=100$:$\frac{-6\mathrm{.}6733}{n}=1000$:$-6\mathrm{.}666733$

c$)$ Find the limit of the formula, as $n,$ to find the exact value of the integral.

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