Assume that the function f\displaystyle {f} is invertible.

(a) If f(5)=4\displaystyle {f{{\left({5}\right)}}}={4}, find f1(4)\displaystyle {{f}^{{-{1}}}{\left({4}\right)}}.
Your answer is  

(b) If f1(8)=2\displaystyle {{f}^{{-{1}}}{\left(-{8}\right)}}=-{2}, find f(2)\displaystyle {f{{\left(-{2}\right)}}}.
Your answer is