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Estimate the area under the graph rectangles and the sample points $x_i^{**}$

$\{1\mathrm{.}07,1\mathrm{.}34,1\mathrm{.}48,1\mathrm{.}63,1\mathrm{.}82\}$

area ~~ $$

Hint: See Figure $13$ on page $337$ of Stewart $($pg $348$ in $3$rd ed$).$

Report answers accurate to $4$ places. Remember not to round too early in your calculations.