?In a use case, the _____ is shown as a stick figurewith a label that identifies its role.

Answer the following statements true (T) or false (F)

1) Counter-controlled repetition requires only a control variable, an initial value for the control variable and an increment or decrement. 2) Counting loops should be controlled with whatever data type most closely reflects the operations taking place, whether that is an int, float or double. 3) The for repetition statement handles the details of counter-controlled repetition. 4) A control variable that's declared in a for statement header is not accessible outside of the body of the for statement.

Which line in the following program contains the prototype showDub function?

``` 1 #include 2 using namespace std; 3 void showDub(int); 4 int main() 5 { 6 int x = 2; 7 showDub(x); 8 cout << x << endl; 9 return 0; 10 } 11 void showDub(int num) 12 { 13 cout << (num * 2) << endl; 14 } ``` a. line 3 b. line 4 c. line 7 d. line 11