If $\displaystyle {f{{\left({x}\right)}}}$ is odd and $\displaystyle {g{{\left({x}\right)}}}$ is odd such that $\displaystyle {f{{\left({1}\right)}}}={8}$ and $\displaystyle {g{{\left({1}\right)}}}={17}$ then:

(a) $\displaystyle {\left({f}+{g}\right)}{\left(-{1}\right)}=$

(b) $\displaystyle {\left({f}-{g}\right)}{\left(-{1}\right)}=$

(c)  $\displaystyle {\left({f}\cdot{g}\right)}{\left(-{1}\right)}=$

(d) $\displaystyle {\left(\frac{{f}}{{g}}\right)}{\left(-{1}\right)}=$

All answers should be expressed in lowest terms, if necessary.