Please complete the following partial C++ program to read three positive integers x, y and z. Then, in each turn, the three values will be shifted to the right (the right-most one becomes the first one) and reduced by 1, and the sum of the three values will be printed. This process will be repeated until one of the value reaches O. #include using namespace std; / TODO: Write the shiftAndReduce(...) function here. (Hint: you can use reference parameters) */ The main() function. No modification is allowed. */ int main() { int x, y, z; cout < < "Input three numbers:" < < endl; cin>>>>y >> z; // Assume all inputs are positive while (x > 0 && y > 0 && z > 0) cout < < "sum = " < < shiftAndReduce(x, y, z) < < " : "; cout < < x < < " " < < y < < < < z < < < < endl; } return 0; Some sample runs are shown as follows (underlined bold characters in blue are user input): Sample Run 1 Input three numbers: 369 sum 15825 sum 12 4 7 1 sum 9:036 Sample Run 2 Input three numbers: 100 1 200 sum 298 199 99 0 Please name your C++ source file as Lab3Ex3.cpp.