整句翻譯，拜託了，急!!!!!!!!!?

1.Their teacher is young.
2.You, me and her are all students.

Their teacher is very young.
You, he, and I are all students. ← 文法：A。
※人稱代名詞在同一句中之順序：單數 2→3→1 / 複數 1→2→3。
※ 文法：一連串項目被列舉時的逗點使用法：A. 如果三個或更多相同作用的項目被一一列舉而且最後一個項目之前有對等連接詞 and、or 或 nor，連接詞之前以及其他各項目之間都應該有逗點。B. 如果每兩個項目之間都有對等連接詞，都不用逗點。

Their teacher is very young.
You and I are her students. (Oh,I中文看錯了)

You, he, and I are all students. ( O )
He, you and I are all students. ( O )
(The comma before the and in a list of three or more items is optional -
This sentence is copied from https://www.grammarly.com/blog/comma/)

如進不去這Link(我電腦進不去)，可點選SIMON就可以看到我最近的一個發問(Please help with the following multiple choice question … )，找到Kristen回答的意見欄，再由Mark提供的一個Link便可找到介紹標點符號的大文章裡面有此句並有詳細說明