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In a trapezoidal rule problem I got following question:

"Evaluate the above integral using trapezoidal rule with five points."

My confusion is here what we take for the value of $n$ is it $5$ or $4$. I'm thinking like suppose if you take $5$ points $1,2,3,4,5$ then there would be $4$ sections/intervals so that's why $n$ should be $4$. Can anyone help me in it that what would be $n$'s value and why? Please provide explanation too if possible. Thanks!

Note: $h=\frac{b-a}{n}$ where $b$ and $a$ are limits.

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    @Julian Thanks for the edit !2012-12-14
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    Thanks should go to @levap. I just approved his edit (and did some minor improvements).2012-12-14
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    Oh then @levap Thank you too friend :)2012-12-14
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    But I've one more confusion that In Trapezoidal or Simpson rule Do we need to integrate the function first or we can directly apply the values to the respective function equation to get the approximation?2012-12-14

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