Question 3 (10 points) You want to calculate the x coordinate of the centroid of area of the shape shown below, which you've divided into two rectangular areas, A1 and A2. a b X A A1 d This is given by the formula Xc = A1+A22 A1+A2 where X1 and X2 are the x coordinates of the centroids of A1 and A2, respectively. You know x1 = 1 ft and x2 = 3 ft exactly. You measure the following distances: a to b = 16.3 0.1 in. b to c = 23.8 0.1 in. c to d = 24.1 0.1 in. d to e 28.6 0.1 in. a. Calculate A1 and A2 and the associated error. b. Calculate x and the associated error, using your error calculations from part a.