Course and speed over the ground with leeway and tidal stream

Manuale Yachtmaster p.22

At 0900 the log reads 10.2; at 1000 it reads 18.0. You steer 077° magnetic in a northerly force 6, giving 5° of leeway. Variation 7°W. The stream sets 120° at 2.0 knots. What are the course and speed over the ground (COG and SOG) for that hour?

Log: 10.2 at 0900, 18.0 at 1000
Magnetic course: 077°M
Variation: 7°W
Leeway: 5°, wind N6
Tidal stream: 120°, 2.0 kn

Solution worked out by us from the course material: to be checked by the instructor.