John drives 16.0 km directly west from Orion to Chester at a speed of 88.0 km/h, and then directly south for 8.00 km to Seiling at a speed of 80.0 km/h, and then finally 34.0 km southeast to Oakwood at a speed of 100 km/h. Assume that he travels at a constant velocity during each of the three segments.

What was the change in magnitude of velocity during this trip?(Hint: Do not assume that he starts from rest and stops at the end.)

__________ km/h

Thank you for your help!