What are the domain and range of the function f(x) = 4?, math homework help

What are the domain and range of the function f(x) = 4?, math homework help

What are the domain and range of the function f(x) = 4?

{x| x is a real number}; {y| y > 0}

{x| x > 4}; {y| y > 0}

{x| x is a real number}; {y| y > 4}

{x| x > 4}; {y| y > 4}