You will design and implement a program in C that computes the distance traveled by a car moving at a constant speed for a specific amount of time. This program must understand different units of measurement for speed, time, and distance. It will also make use of a user-defined function to perform the actual calculation.

The algorithm will ask the user for the following information:

1. The speed at which the car is traveling.
2. The units of the speed value provided in (1). Use the "menu" command to provide the following options: miles per hour, kilometers per hour, meters/second, feet/minute
3. The time that the car has been traveling at the indicated speed.
4. The units of the time value provided in (2). Use the "menu" command to provide the following options: seconds, minutes, hours, days
5. The units in which to display the answer. Use the "menu" command to provide the following options: miles, kilometers, meters, feet

It will then call a function that receives the necessary details in order to perform the distance calculation. Upon calculating the distance, the function will send this value back to the main program where it is then printed to the screen. Note that you might consider first performing a base calculation (in either the main program or the function) to convert all input values to a standard set of units.