have a test get a test take a test それぞれ何が違いますか？

添付画像の英文の全文和訳をお願いします！

(旭eagzng 英文を読んで以下の質問に答えましょう。 PED yior fg dog 7 7gvo77fe 7/qce の7 Cg77DG。 Therc are lots of good places on campus to hang out. Between classes. youll probabIy fnd me relaxing somewhere with friends or studying for a test. One ofmy favorite spots is the Hibrary. THike spending time at the library because itS quietandlcan concentrate on studying. Sometimes 1 fall asleep、though. ITI have along break beveen classes Ilike to hang out in the student lounge. Lots of my clasSmates are (here and we can study toOgether There are als0 some PC ofnoisy around noon。 so iWS not a good Just look around campus and VOuire you like. Maybe TIl see you arOund langout ぶらぶらする/ 人asleepl sec you around あなたがいるのを見つけ

Not another test！ これなんて訳しますか？

Animals were housed either in social isolation (1 mouse per cage) or in social groups (5 mice per cage) for 9 – 12 weeks prior to t... Read More

この問題がわかりません。 解き方を教えていただけるとありがたいです。 答えは R_3=(R_1^2/R_2)+2R_1 R_4=R_1+2R_2 です。 YΔ変換の問題です。 よろしくお願いします。