1.

Consider the function r-4 if x * 4 f(I) = 2-16 1 if r = 4 a) Suppose first that I 4 In this case, simplify the following expression so that it does not involve an absolute value: I - 4 12 -16 d) Compute the following limit. lim f(I) = e) If possible, find the value of a such that f is continuous at I = 4. If there is no value, write empty. 1 =