The formula for calculating the area of a triangle with sides a, b, and c can be calculated using Heron's formula: area = sqrt(s * (s - a) * (s - b) * (s - c)) , where s = (a + b + c)/2 . Using this formula, write, compile, and execute a C program that calculates and displays the area of a triangle having sides of 3, 4, and 5 inches, the area should be 6. Hint: 1. you should input three sides of the triangle, display the area. 2. a, b, and c should be of type double 3. display the area, 2 digits after decimal point