By Yelena Mandenberg In a frightful fall from the fourth story, a beloved estate agent ended his life, devastating a community. The 56-year-old man jumped from the fourth floor of an Upper East Side building on Tuesday. He has been named as Tom Cooper, a Douglas Elliman real estate agent and tenant of the building. Tom Cooper, a California-born UC Berkeley graduate, lived in a one-bedroom flat at 18 E. 67th St., which he rented in January 2021. He left behind a note, police say. “We are deeply saddened by the tragic loss of our dear friend and colleague,” Elliman’s president and CEO Scott Durk…