combinations of functions - adding and subtracting let f = {(-4, 4), (-2, 4), (1, 3), (3, 5), (4, 6)} and g = {(-4, 2), (-2, 1), (0, 2), (1, 2), (2, 2), (4, 4)} determine: a) f + g b) f + f c) g + f d) g - g provide an explaination on how you got the answer. you so much in advance