Let A(x)=1xf(t)dt\displaystyle {A}{\left({x}\right)}={\int_{{1}}^{{x}}}{f{{\left({t}\right)}}}{\left.{d}{t}\right.} where f\displaystyle {f} is the function given by the graph below.

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A(5)\displaystyle {A}{\left({5}\right)} =  

A(7)\displaystyle {A}{\left({7}\right)} =