A puck on ice has been moving north with constant speed 10 m/s. At time t=0, it experiences a constant acceleration of 5 m/s² in the eastward direction for a period of two seconds. After the two seconds, the puck is

1. moving eastward.
2. moving northward.
3. moving northeast with a speed greater than 10 m/s.
4. moving northeast with a speed equal to 10 m/s.
5. moving northeast with a speed less than 10 m/s.
6. not moving.