<img src=https://huaweicloudobs.ahjxjy.cn/5D4CBB356F877148D6449048522A2185.png title=4.png alt=4.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/A2DABF38F3AF3B36DBF025AA23F4F807.png title=4-1.png alt=4-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/088A007A927A0EC33B29E097EFD64EE3.png title=4-2.png alt=4-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/83769A66D5DA963CFC6AF9985C6276EA.png title=4-3.png alt=4-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/D208CC045685F7F275B258045772D36E.png title=4-4.png alt=4-4.png/>