I'm not sure how to solve this

The highway department wants to estimate the proportion of vehicles on Ontario's Highway 401 between the hours of midnight and 5 am. that are 18-wheel tractor trailers. The estimate will be used to determine highway repair and construction considerations and in highway patrol planning. Suppose researchers for the highway department counted vehicles at different locations on the highway for several nights during this time period. Of the 3413 vehicles counted, 960 were 18-wheelers Determine the point and 99% interval estimate for the proportion of vehicles travelling Highway 401 during this time period that are 18-wheeler. Main Formula : pluribution Cont. Intervals Critical value (# applicable) Loft critical Value [If applicable] Right critical value) Point Estimate Interval Estimaty UCL LCL