Can someone help with number 2?

1. DeSean heads north, directly across a river. He can swim with a velocity of 3.7 m/s. If the river has a current of 2.3 m/s east, what is DeSean's resultant velocity? 2. Suzie can swim with a speed of 3.3 m/s. She wishes to swim directly south across a river which is flowing due west at 2 m/s. What direction must she head? How fast does she appear to be swimming to a bystander