1．The function f is given by $$\mathrm { f } ( x ) = x ^ { 2 } - 2 x + 6 , \quad x \geqslant 0$$ （a）Find the range of \(f\) ． The function \(g\) is given by $$\mathrm { g } ( x ) = 3 + \sqrt { } ( x + 4 ) , \quad x \geqslant 2$$ （b）Find \(\operatorname { gf } ( x )\) ．
（c）Find the domain and range of gf．