Identify the following items in the programming code shown below?

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Identify the following items in the programming code shown below.

#include<iostream>

using namespace std;

int one,
void hello(int&, double, char);

int main ()
{

int x;
double y;
char z;

hello(x, y, z);

hello(x, y -3.5, 'S');

}

void hello(int& first, double second, char ch)
{
int num;
double y;
int u;

}

Can someone identify this? Thanks!
1.Function call statements, formal parameters, and actual parameters
2.Value parameters and a reference parameters
3.Local variables and global variables
 
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