The graph $offis$ shown.

Evaluate each integral $by$ interpreting $itin$ terms $of$ areas.

$(a){\displaystyle \underset{0}{\overset{8}{}}}f(x)dx$

$64$

$(b){\displaystyle \underset{0}{\overset{20}{}}}f(x)dx$

$144$

$(c){\displaystyle \underset{20}{\overset{28}{}}}f(x)dx$

$(d){\displaystyle \underset{12}{\overset{28}{}}}f(x)dx$

$16x$

$(e){\displaystyle \underset{12}{\overset{28}{}}}|f(x)|dx$

$(f){\displaystyle \underset{8}{\overset{0}{}}}f(x)dx$

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