What is the value of x after foo is invoken in main function? #include using namespace std; void foo(int &, int& , int); int main() { int x = 5, y = 10, z = 2; foo ( x, y, z ) ; // what are the values of x here return 0; } void foo ( int &a, int &b, int c ) { a= b++<5?8:13; while (b>8) c = c-(--b); } a) b)13 c)5 D)8 E) 11