The functions are .

To find .

                       (Substitute g(2) = 0)

                             ( f(10) is undefined)

Since 10 is not in the domain of f, is undefined for x = 1, 

To find .

                                 (g (7) is undefined)

                           (Substitute f(1) = 2)

                      (Substitute f(2) = 1)

Since -7 is not in the domain of g,  is undefined for x = 0,

and .