please solve it step by step its related to transoprtation plan course

All trips are made with a single-occupancy vehicle Case A Case B The average occupancy rate of vehicles is 18 Persons/Veh No public transport exists A bus route introduces with a frequency of 8 bus/hr. The capacity of the bus is 61 persons The bus is full of passengers on all the trip Case C Given that You have only two zones The length of the freeway connecting the two zones is 3200 km The Demand between the two-zone is 6210 person trip The bottleneck capacity of the freeway is 1200 veh/ht/lane Answers the following question ? What the number of lanes needed for each case ? Which case is the most environmentally friendly? Prove your answer with numbers