1. The problem statement, all variables and given/known data A train at a constant 79.0 km/h moves east for 25 min, then in a direction 37.0° east of due north for 18.0 min, and then west for 54.0 min. What are the (a) magnitude (in km/h) and (b) angle (relative to north, with east of north positive and west of north negative) of its average velocity during this trip? 2. Relevant equations Apparently I don't know. 3. The attempt at a solution I really have no idea where to even start.