Please show all work. (1) If f(x) = x2 +2x, calculate f' (x) using the definition of the derivative. (2) If f(a) = 5x3 +3 - 2x-4, calculate f' (x). (3) If f(a) = 23ex, calculate f' (x). If f ( ac) = 12+2x, calculate f'(x). (5) Determine if f(x) is continuous at x = 0 if x2+ 2 if x > 0 f (2) = 12-2 if x