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

Evaluate the following integrals by interpreting them in terms of areas:

(a) $\displaystyle \int_{0}^{\,2} {f(x)}\,dx =$

(b) $\displaystyle \int_{0}^{\,5} {f(x)}\,dx =$

(c) $\displaystyle \int_{5}^{\,7} {f(x)}\,dx =$

(d) $\displaystyle \int_{0}^{\,9} {f(x)}\,dx =$