a$.$ Imagine you also want to keep track of student majors. How would you do this? Would you modify an existing table? Would you add new tables? Why or why not? $(10)$ b$.$ Why do you suppose the system needs a $$Course Title$$ table? $(5)$ c$.$ This database is simplified for our brief introduction. What additional data would you need to keep track of if this were a real course registration system? What changes would you make in the database above to account for these needs? $(10)$ d$.$ Why do you need a STUDENT$\_$ID$?$ Why don$$t you just use a student$$s last name? $(5)$ e$.$ Could you use Social Security number as a STUDENT$\_$ID$?$ Why or why not? $($Hint: Feel free to search on the Internet for