A sailboat tracking against the wind moves as follows: 3.2 km at 45 degrees east of north, 4.5 km at 50 degrees west of north, and 2.6 km at 45 degrees east of north. The entire motion takes 1 h 15 min.
(a) What is the total displacement for this motion?
(b) What is the average veloticy for this motion?
(c) What is the speed if it is assumed to be constant?