最近我校要开展一次《规范知识》竞赛活动,但学校没有抢答器,请你设计一个抢答器的电路图.要求不论哪一组按开关,主持台上电铃要响,而且用不同颜色的指示灯告示主持人是第几组按开关;假设4组参赛,分别用红、绿、黄、 Recently, our school to carry out a “normative knowledge” contest, but the school did not answer the answer, please design a circuit diagram of the responder.Requirement regardless of which group press the switch to host the bells ring, and with different colors of light Notice the host is the first group by switch; Assuming 4 groups participating, respectively, with red, green, yellow,