3-2 A river flows due east at 2.55 m/s . A boat crosses the river from the south so's shore to the north shore by maintaining a constant velocity of 12.2 m/s due north relative to the water. (a) What is the magnitude of the boat's velocity relative to shore? m/s ( + 0.2 m/s) (b) What is the directon (degrees east of north) of the boat's velocity relative to shore? * east of north ( + 0.2 . east of north) (c) If the river is 324 m wide, how far downstream has the boat moved by the time it reaches the north shore? m ( + 1.5 m)