Due South Stream A River Flows Due East At 2.37 M/s.?

A river flows due east at 2.37 m/s.? - due south stream

A boat
across the river from the south coast to
North Shore, maintaining a constant speed
ITY of 10.5 m / s to the north over the water.
a) What is the size of the velocity
the boat as an observer on Earth?

b) How many degrees is the boat from its course
forced by the current?
Answer in units of ◦.

c) If the river is 187 m wide, how deep
Now the boat when it reaches the northern
Shore?
Answer in units of m

THANKS soo help:]