Three separate attacks on Chicago Police within a wild 24-hour period were mercifully unsuccessful, authorities say. But a trio of defendants now face felony charges in connection with the unrelated attacks Friday and Saturday. They began at lunchtime Friday, when Jenkins Cooper, 40, allegedly fired four shots at an FBI agent and Chicago cops as they executed a search warrant on his Englewood home. The shots Cooper allegedly fired from a revolver at his house on the 7300 block of South Wood all missed, and he came outside with his hands up soon after, prosecutors said Sunday. “I didn’t know …