Read the excerpt from The Riddle of the Rosetta Stone by James Cross Giblin.All his years of painstaking and often frustrating attempts at deciphering had been rewarded. "I am going to do it," he had said as a boy when the mathematician Fourier showed him a copy of the Rosetta Stone. Now he had succeeded.Based on details in the excerpt, the reader can conclude that Champollion mostly felt about his accomplishment