5 [10 pts] Approximate the value of the definite integral ( r dr by using a) a left-hand sum with Ac = 0.2. b) a right-hand sum with Ar = 0.2. c) Improve your estimation by taking the average of the approximations from a) and b). d) Use the Fundamental Theorem of Calculus to find the exact value of fr'dr and compare it with the previous three approximations