R$5\mathrm{.}5$ Consider these methods:

public static double double $x)\{$ return $g(x)+$ Math. $\sqrt[\phantom{2}]{h(x)}$; $\}$

public static double $g($double $x)\{$ return $4**h(x)$; $\}$

public static double $h($double $x)\{$ return $x**x+k(x)-1$; $\}$

public static double $k($double $x)\{$ return $2**(x+1)$;