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Find $$S _ { 4 } , S _ { 8 }$$ , and $$S _ { 16 }$$ for $$\int _ { 0 } ^ { 1.6 } f ( x ) d x$$ for the function $$f$$ whose values are tabulated in Exercise $$9$$ of Section $$6.6 .$$
$$\left. \begin{array} { l } { S _ { 4 } \approx 2.0343333 , \quad S _ { 8 } \approx 2.0303133 } \\ { S _ { 16 } \approx 2.0296433 } \end{array} \right.$$