The Tourist Delivery Program was developed by several European automakers. In this program, a tourist from outside Europe-most are from the United States-may purchase an automobile in Europe and drive it in Europe for as long as six months, after which the manufacturer will ship the car to the tourist's home desti- nation at no additional cost. In addition to the time limitations imposed, some coun- tries impose mileage restrictions so that tourists will not misuse the privileges of the program. In setting the limitation, some countries use a normal distribution assumption. It is believed that the number of kilometers driven by a tourist in the program is normally distributed with mean 4,500 and standard deviation 1,800. If a country wants to set the mileage limit at a point such that 80% of the tourists in the program will want to drive fewer kilometers, what should the limit be?