Help C++ advance

Complete the definition of the add() function below. This function adds its five input arguments and returns the result. int add(int a, int b, int c, int d, int e){...} Complete the definition of the average() function below. This function finds the average of the five input arguments and returns the result. double average (int a, int b, int c, int d, int e){...} Complete the definition of the maximum() function below. This function finds the Largest input argument (the input argument which is Larger than other four input arguments) int maximum(int a, int b, int c, int d, int e){...} Complete the definition of the dotproductO function below. This function finds the dot product of the input vectors v1 and v2. double dotproduct(vector v2){...} For instance, in the following main() function would print out 17 since the dot product of {1, -2, 6} and {3, 5, 4} would be the sum of elementwise multiplications: (1)*(3) + (-2)*(5) + (6)(4) = 17: int main(){vector v1 {1, -2, 6}; vector v2{3, 5, 4); cout