For f(x) = x +4 and g(x)=?x-2, find the following composite functions and state the domain of each.(a) fog(b) gof(c) fof(d) gog(a) (fog)(x) = (Simplify

For f(x) = x² +4 and g(x)=?x-2, find the following composite functions and state the domain of each.(a) fog(b) gof(c) fof(d) gog(a) (fog)(x) = (Simplify your answer.)Select the correct choice below and fill in any answer boxes within your choice.A. The domain of fog is {x}.(Type an inequality. Simplify your answer. Use integers or fractions for any numbers in the expression.)B. The domain of f o g is all real numbers.(b) (gof)(x) = (Simplify your answer.)Select the correct choice below and fill in any answer boxes within your choice.