A woman who can row a boat at 6.4 km/h in still water faces al long,.......?

Question

straight river with a width of 6.4km and a current of 3.2 km/h. Let i piont directly across the river and j point directly downstream. It she rows in a straight position, (a) at what angle to i must she point the boat and (b) how long will she take? (c) How long will she take if instead, she rows 3.2km up the river and then back to her starting point? (e) At what angle to i should she point the boat if she wants to cross the river in the shortest possible time? (f) How long is that shortest time?

the answer is a = -30degrees
b = 69min.
c = 80min
d = 80 min
e = 0degrees
f = 60min

Answer 1

Could you draw a picture?