Purpose: The project is designed to ensure that the students know how to the write and call functions. Before start: Review chapter 4. Make sure that you understand the following things: How to declare a function. How to write a function. How to call a function, including call function A from function B which is not main function. Problem: Write a program to take a depth (in kilometers) inside the earth as input data; compute and display the temperature at this depth in degrees Celsius and degree Fahrenheit. The relevant formulas are: celsius = 10*depth + 20 (Celsius temperature at depth in km) fahrenheit = 1.8*celsius + 32. You should include four functions in your program. 1. void print_introduction (void) // prints out information to tell the user what this program does. 2. double celsius_at_depth (double depth) // computes and returns the celsius temperature at a depth measured in kilometers. 3. double celsius_to_fahrenheit (double celsius) // converts a Celsius temperature celsius to Fahrenheit. 4. void print_conclusion(double depth) // display the conclusion that what is the temperature in Fahrenheit at depth of the earth Requirement: There is no calculation in main function except function calls to two void functions. The pseudo code for main function is follows: Step 1: print introduction by calling print_introduction function Step 2: ask user to enter the depth Step 3: get users input Step 4: print out the conclusion by calling print_conclusion function Step 5: ask user if he/she wants to continue Step 6: get users input Step 7: repeat step 1 to step 6 if user picks Y or y Step 8: Stop program All the necessary calculations are done in print_conclusion function. i.e. celsius_at depth and celsius_to_fahrenheit functions are called from print_conclusion function. There is no explicit calculation in main function. No calling to two calculation functions in main function. Run the demo the see the sample output