I'm fairly inexperienced with Network Analyst and unsure which tool to use. I have a spreadsheet of taxi trips, each with a unique ID. Each trip has a pickup latitude and longitude, and a drop-off latitude and longitude. I've created two shapefiles, one for pickups and one for drop-offs. I want to use Network Analyst to calculate the number of miles traveled between each set of origins and destinations. Which function should I use, and how should I set up my data?