3. For each of the following functions, find all values a in (-00, o) at which the function is discontinuous (if there are any). At each such value, compute the two one-sided limits lim f(x) and xa+ lim f(x), DI and say what type of discontinuity (removable discontinuity, jump discontinuity, vertical asymptote, or other) occurs at a. If there is a removable discontinuity, explain how you could redefine the function at that point to make it continuous. (a) h(x) (b) g(t) = In|et - 4| (c) f(x) = = COS s (4) (d) g(x) = arctan(-) In a