By MacDonald Dzirutwe and Joe Brock HARARE (Reuters) – Zimbabwe’s President Emmerson Mnangagwa and his main opponent Nelson Chamisa both said on Tuesday they were confident of victory, after peaceful voting in the first election since the end of Robert Mugabe’s nearly four decade rule. Mnangagwa, 75, a long-serving security chief who took power after Mugabe was toppled in a de facto coup in November, said he was receiving “extremely positive” information on the vote. Chamisa, 40, said his opposition Movement for Democratic Change (MDC) had done “exceedingly well”.