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Question 2 [9 marks] k(22) 1/2 Consider the function f(x) = Ex - 4 x > 4 . Where k E R and x / 0. Vx +5 -3 a. Determine the value of & that ensures f is continuous at x = 4. b. Assuming k is the result from part (a), define f in Maple and evaluate lim f(x) and lim f(x). State your answers. Using these results, is f continuous at x = 0? Explain your answer. z-+0 2-+0+