asinx+l3, if x E 21: 4. ConSIder gfx) = {x2 _ x + 2' if x } 2H A. Find the values of a and :5} such that 900 is a differentiable function (12 points). B. Write the equation of the tangent line to gar} at x = 2n. (9 points) C. Use the tangent line equation from part B to write an approximation for the value of 9(6). Do not simplify. (6 points)