6- Evaluate the following statement using stack :

Z = product ( 1 , 3 ) ; Where product( ) defined as follows :

int product ( int x , int y )

{

int m ;

if ( x == y )

return x + x ;

else

{ m = ( x + y ) / 2 ;

return product( x , m) * product( m+1 , y ) ;

}

}