write a class named Student that contains properties: firstName, lastName and Grade, and methods: setFirstName, setLastName, setGrade. Fill in the missing instruction. 1 #include 2 #include 3 using namespace std; 4 5 class Student 6 string fname, Iname: int grade; 8 public 9 void setFirstName(strings) 10 fname=s; } 11 12 13 void setGrade 14 15 int main 16 string str; int val; 17 Student 18 rose.setFirstName("Rose") 19 cout>val; 24 25 return 1; 26 ) 27 int Student:: 28 29 }