Which of the following functions have the property that f(2") = (f(x))* ?(You should be able to check these by hand.) f(z)=z+c \text { for } c \in \mathbb{R} \text { | Select ] } f(z)=c z \text { for } c \in \mathbb{R} f(z)=c z \text { for } c \in \mathbb{C} \backslash \mathbb{R} \quad \mid \text { Select }]

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