Indicate whether the set defines a function. If it does, state the domain and range of the function.{(1,7),(2,7),(3,7),(4,7)}

A function, Domain = (7); Range = {7}

A function, Domain = {7}; Range = (1,2,3,4)

A function, Domain = {1,2,3,4}; Range = {7}

Not a Function