TOEFL 3 this is training! please mark and correct.

Q. Some students prefer to study alone. Others prefer to study with agroup of students. Which do you prefer? Use specific reasons andexamples to support your answer.

Some people say it's better to study individually than with a group, however, I cannot agreewith this opinion personally. I can find some advantages in studying with a group of students. I explain them one by one.
First, studying with my friends, I can obtain new information and knowledges. Because the quantity of knowledges obsessed by one person is limited, I can utilize much knowledge cooperating with my fellows. As a result, with my group, my study would proceed more efficiently than doing alone.
Second, I can maintain stability of my mentality. Study can be sometimes much hard and heavy works. Then, some people lose their mental health. There are many students commiting suicidein graduate schools. Exchanging with my friends makes me relax and remenber that I have much support.
In conclusion, as mentioned above, I prefer to study with my friends. I think it is importantfor sustainable studying to work efficiently and in good mentality.