(6) a) Sketch the function f(x) = 2 from x = -2 to 2 = 2. b) Approximate the signed area of f(x) on [-2, 2] by using right hand sums with n = 4. Is this an overestimate or and underestimate of the actual signed area? c) Approximate the signed are of f(x) on [-2, 2] by using left hand sums with n timate of the actual signed area? 4. Is this an overestimate or and underes- = d) On the graph that you drew in part a), sketch the rectan- gles that you used in parts b) and c). e) Find the exact signed area of f(x) from x = -2 to x = 2.