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Given functions f and 9, nd (a) (f o g)(x) and its domain, and (b) (g o f)(x) and its domain. f(X)= W. 9(X)=x+ 7 RMownj (Simplify your answer. Type an exact answer, using radicals as needed.) The domain of f o g is E. (Type your answer in interval notation. Use integers or fractions for any numbers in the expression.) wugomn= (Simplify your answer. Type an exact answers, using radicals as needed.) The domain of g of is E. (Type your answer in interval notation. Use integers or fractions for any numbers in the expression.)