I need help writing functions in C++ that asks for and return the following: 1. The amount of any car rentals 2.Miles driven, if a private vehicle was used. Vehicle expense is 0.27 $ per mile driven. 3.Parking fees.(The company allows up to 6 per day. Anything in excess of this must be paid by the employee), 4. Taxi fees(The company allows up to 10$ per day, for each day that taxi was used. Anything in excess must be paid by the employee. The functions must be written using loops.