Elementary school mathematics 5+3 pts

the student population at south side middle school is listed in the table below
boys girls
98 102
89 105
123 117

a. use the information in the table to find the total number of students who attend south side middle school. show your work.

b. about how many more girls are enrolled in the school then boys? show your work. explain how you found your answer.
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c. the school board wants the school to have one teacher for every 20 students. if there are 8 six-grade teachers, does the school need to hire more sixth grade teachers? if so, how many more? explain your answer