The function y = f (x) has the following graph: Points a though g have x-values 1, 1.5, 2, 2.5, 3, 3.5 and 4, respectively. At which points does the limit of the function exist? a b c d e f g At which points is the function continuous? a b c d e f g At which points is the function differentiable? a b c d e f g