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Part II Solve each of the following problems. Show your complete solutions. 8.Mr. Javier designed an arch made of bent iron for the top of a school's main entrance. The 12 segments between the two concentric semicircles are each 0.8 meter long. Suppose the diameter of the inner semicircle is 4 meters. What is the total length of the bent iron used to make this arch? 0.8 m 4 m 169-10.) A bicycle chain fits tightly around two gears. What is the distance between the centers of the gears if the radii of the bigger and smaller gears are 9.3 inches and 2.4 inches, respectively, and the portion of the chain tangent to the two gears is 26.5 inches long