Alice implemented a program that reads, inverts, and writes back N very large matrices. In order to boost the program performance, Alice was advised by Chuck to start N threads, each of which inverts its own matrix (the data is still read and written using one master thread). Alice runs the program on a single-CPU, single-core computer. What is the expected effect of changing the number of threads from1 to N on the program execution time

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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;