Driver Cost System Design

Problem Statement Design a driver payment system with the following functionalities: Add_driver(driver_id, usd_hourly_rate): Add a new driver and set their hourly rate. Record_delivery(driver_id, start_time, end_time): Record a completed delivery with the given driver ID and start-end times. Get_Total_Cost(): Return the total cost that the delivery platform needs to pay to all drivers. Note: Each delivery record is entered into the system in chronological order. Task 1 Implement the update of total payment (total_pay) when driver records are updated. Record and store each driver's delivery records. Task 2 Pay_Up_To(pay_time: int): Pay for all completed orders before the given pay time (note: each record is paid only once). Total_Cost_Unpaid(): Calculate and return the total costs of unpaid deliveries. Implementation details: Use pointers to manage paid records and update a global variable (totalpaid) to track the paid amount. Use Get_Total_Cost minus totalpaid to get unpaid costs. Task 3 Given a timestamp, calculate the number of drivers who were online in the previous 24 hours. Use binary search on each driver's record list to verify. Tips Object-Oriented Design is recommended by defining a Driver class to store driver information. Determine the timestamp format, and consider using float for simplification. Format financial calculations to two decimal places. Example Input add_driver(1, 10.0) record_delivery(1, 9, 11) get_total_cost() pay_up_to(12) get_unpaid_cost()