Given the function graphed below, evaluate the definite integrals.

${\displaystyle \underset{0}{\overset{1}{}}}f(x)dx=$

${\displaystyle \underset{1}{\overset{2}{}}}f(x)dx=$

${\displaystyle \underset{2}{\overset{4}{}}}f(x)dx=$

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$$

${\displaystyle \underset{4}{\overset{8}{}}}f(x)dx=$

$$

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

$$