CHALLENGE ACTIVITY 7.3.1: Functions: Factoring out a unit-conversion calculation. Write a function so that the main() code below can be replaced by the simpler code that calls function MphAndMinutesToMiles(). Original main(): int main() { double milesPerHour; double minutesTraveled; double hoursTraveled; double milesTraveled; cin >> milesPerHour; cin >> minutesTraveled; hoursTraveled