A spacecraft is observed to be at a location < 200, 300, -400 > m relative to an origin located on a nearby asteroid, and 7 seconds later is observed to be at location < 410, -85, -617 >.
A) What is the average velocity of the spacecraft during this interval? = <210,-385,-217>/7
B) What is the average speed of the spacecraft during this period?
C) What is the unit vector in the direction of the average velocity?