若建立3个乘车点，为使教师和工作人员尽量满意，至少需要安排多少辆车？给出每个乘车点的位置和车辆数。假设每辆车最多载客45人（假设车只在起始站点载人）。-If you create a three-point ride, as far as possible so that teachers and staff satisfaction, at least need to arrange how many cars? The number of points given for each car and vehicle location. Assuming a maximum capacity of 45 people per vehicle (assuming that the car is only the start site manned).