<img src=https://huaweicloudobs.ahjxjy.cn/FB125A5C638A733F2E25066D6EBE1A45.png title=2.png alt=2.png/>
①
<img src=https://huaweicloudobs.ahjxjy.cn/559AA49E4B715CA8E4564367541FB32B.png title=2-1.png alt=2-1.png/>
②
<img src=https://huaweicloudobs.ahjxjy.cn/6B8992172FD0DA673284EADA0DEBA3B1.png title=2-2.png alt=2-2.png/>
③
<img src=https://huaweicloudobs.ahjxjy.cn/8307E3C9FB06876FE108BCD178A75B33.png title=2-3.png alt=2-3.png/>
④
<img src=https://huaweicloudobs.ahjxjy.cn/2779B84DB2CCFC5CE6E9837B0E0AA5B5.png title=2-4.png alt=2-4.png/>