On a sailing trip, what is the distance between the first and second island, given the following directions? (a) 22.0° west of north, (b) 70.0° east of south.
a) (a) 7.00 km, (b) 3.00 km
b) (a) 7.00 km, (b) 7.00 km
c) (a) 3.00 km, (b) 7.00 km
d) (a) 3.00 km, (b) 3.00 km