This should look familiar as it is very similar to the Quicksort method we looked at in class. However, there is a difference. Note that there is more going on in the pivot function, and there are three recursive calls instead of two. (a) Briefly describe the difference between this Quicksort variation and typical Quicksort. (b) Discuss the best and worst-case runtime of this algorithm by giving recurrence relations and giving the big-Oh runtimes. Make sure you explain everything.

Which of these is most responsible for differences between the twentieth century to the twenty-first century?

Which type of tab stop is most for weights and measurements?

Consider the following statements: struct nametype{string first; string last; }; struct coursetype{string name; int callnum; int credits; char grade; }; struct studenttype{nametype name; double gpa; coursetype course; }; studenttype student; studenttype classlist[100]; coursetype course; nametype name; mark the following statements as valid or invalid. if a statement is invalid, explain why.a.) student.course.callnum = "csc230"; b.) cin > > student.name; c.) classlist[0] = name; d.) classlist[1].gpa = 3.45; e.) name = classlist[15].name; f.) student.name = name; g.) cout < < classlist[10] < < endl; h.) for (int j = 0; j < 100; j++)classlist[j].name = name; i.) classlist.course.credits = 3; j.) course = studenttype.course;