4. (12 points) Indicate for each of the following pairs of expressions (f(n), g(n)), whether f(n) is 0, 2, or of g(n). Prove your answers. Note, if you choose 0 or 12, you must also show that the relationship is not . (a) f(n) = 12n, and g(n) =n? Answer for (a): (b) f(1) = 1, and g(n)- tsinn Answer for (b)