5. Classify each of the following as a function, a partial function, or not a function. (If it's both a function and a partial function, choose "function"-the more exact classification.) a) f (1, a)) for domain space 1 and range space (a, b}. b) f(x) - 1/x when both domain and range space are the Real numbers (R) c) f(x)sin(x) when domain space is the Natural numbers (N, the non-negative integers) and range space is R. d) f(x)x% when both domain and range space are R. (Recall that the square root of a positive number n is n.) e) f(x, y)- max(x, y) for domain space R x R and range space R. f) f = {(, a), (, b), (, b)) for domain space 1, 2) x {1, 2) and range space fa, b. for domain space 1) x 1,2) and range space (a, b)