2班级同学的分组情况以及考试成绩分别存储在字典xs和列表cj中。若xs={"第1组":["小张","小李","小王"],"第2组":["小黄","小霞","小斌"],"第3组":["小蓝","小华","小诚"]}，cj=[{"小张":90,"小李":80,"小王":75},{"小黄":86,"小霞":70,"小斌":89},{"小蓝":67,"小华":90,"小诚":77}]，访问第1组第2位同学姓名以及他的考试成绩的方法为? ( )