Consider the graph $of$ the function $g(x)$ :

The graph from $x=2tox=6is$ a semicircle. Evaluate the following integrals $by$ interpreting them $in$ terms $of$ areas:

$(a){\displaystyle \underset{0}{\overset{2}{}}}g(x)dx=$

$(b){\displaystyle \underset{2}{\overset{6}{}}}g(x)dx=$

$(c){\displaystyle \underset{0}{\overset{7}{}}}g(x)dx=$