(5%) Problem 21: Aboat can be rowed at a speed of 7.36 kah in still water. The boat is in a river that moves at a speed of3. 94 lcmfh. The river is {3.44 km Wide and ows in a straight line and has straight banks. D 3 17% Part (a) How much time, in minutes, is required to NW 2. 76 km downstream (with the ow} in the river? Grade Summer}r I = | Deductions 0% Potential 100% Submissions Attempts remaining: i {0% per attempt] detailed view Submit Hint Hints: 0% deduction per hint. Hints remaining: l Feedback: 0% deduction per feedback. E a 17% Part (b) HOW much time, inminutes, is required to row 2. 7 6 km upstream (against the ow) in the river? E a 17%: Part (c} At what angle, in degrees, to the bank should the boat be aimed if it is to move straight across the river (perpendicular to the river ow)? E a 17%: Part (d) Following up on part (c), how long, in minutes, does it take to row across the riverto the other bank ifthe boat is aimed to more straight across the river? E a 1?% Part 02} Suppose the boat is directed straight across the river rather than angled to compensate for the river's ow. In this case how much time, in minutes, does it take the boat to get to the other bank? E a 17%: Part (fj- Following up on part (e), how far downstream, in kilometers, is the boat when it reaches the other bank if it crosses the river while directed straight across the river