Fill the parts that are missing in the attached code. This code will caluclate the area of a Parabola.

// Console.pplication29.cpp: This file contains the 'main' function. Program execution begins and ends there. // #include "peh.h" #include using namespace std; class Parabola private: double a, b, c; public: void read_coeffs(); double calc_area (double, double); }; void Parabola:-read_coeffs () ???? // Get the coefficients double Parabola: :calc_area (double xi, double x2) double integral_result; integral_result = (2-x2x2+x2 / 3 + b + x2+x2 / 2 + c - x2) - (a-xi-xi-x1 / 3 + b + xl x1 / 2 + c xl); return integral_result); int main() double left_limit, right_limit, area; Parabola pi, p2; ?? cout > ?? area = ?? cout > ?? area =?? cout