3. a. Sketch the following functions. Determine whether the function is continuous or discontinuous. State the value(s) of x where there is discontinuity. Justify your answers. (x, x≤-4 f(x) = 5, -4 < x≤3 (x² - 4, x>3 b. (3x+1, x < -1 f(x) = {2-x², x>-1

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