write c++ program for the following question

uppose a, b, and c denote the leneths of the sides of a triangle. Then the area of the trfangle can be alculated using the formula: s(s-a)(s-b)(s-c) area = Where s (1/2)(a + b + c). Write a program that uses this formula to find the area of a triangle. Given the radius, in inches, and price of a pizza, write a program to find the price of the pizza per square inch. Equation to calculate area is Area =1r2 Suppose that the cost of sending an international fax is calculated as follows: a. Service charges $ 3.00 b. $ 0.20 per page for the first 10 pages c. And $ 0.10 for each additional page e 4 of 5