A woman who can row a boat at 7.3 km/h in still water faces along, straight river with a width of 6.8 km and a current of 3.3km/h. Let point directly across the river and point directly downstream. If she rows in astraight line to a point directly opposite her starting position,
a) At what angle to must she point the boat and(b) how long (in hours) will she take?
c) How long (in hours) will she take if, instead,she rows 3.8 km down the river and then back to herstarting point?
d) How long (in hours) if sherows 3.8 km up the river and then back to her startingpoint?
e) At what angle to should she point the boat if she wants to cross the river in the shortest possible time?
f) How long (in hours) is that shortest time?