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A hiker leaves camp at 8am on level terrain. At 9am she is 5 km east...

A hiker leaves camp at 8am on level terrain. At 9am she is 5 km east of her starting point. At 10am, she is 2 km northeast (45 degrees N of E) of where she was at 9am. At 11am she is 5 km north of where she was at 10am. What is her displacement with respect to starting point, and what was her average velocity for the hike?

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