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(1) The displacement vector A las a length La and a direction east of north; the displacement vector B has a length Le and a direction west of north. What are the magnitude and direction of Ax B? (b) B x A? (c) Write out the vector A x B in terms of the unit vectors i, j, and k. [15 pts] (2) A boat with a maximum speed v (relative to the water) is on one shore of a river witha width d. The river is flowing with speed V. (a) Traveling in a straight line (i.e. perpendicular to the shore) how long does it take the boat to et to a point directly across? (b) What is the fastest possible crossing time to any point on the opposite shore? [20 pts

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