A trekker navigates a meandering path for 5.6 hours to ascend a peak. The journey spans 11.6 km, culminating at a summit 860 m high and positioned 9.0 km due north of the commencement point. Assess the trekker's mean speed and the average velocity vector's magnitude and orientation.

• A. Average Speed: 2.07 km/h, Average velocity vector: (1.61$\overrightarrow{j}$+ 0.15$\overrightarrow{k}$)km/hr, Magnitude: 1.61 km, Direction: 5.4° above the horizontal, due N
• B. Average Speed: 6.07 km/h, Average velocity vector: (1.61$\overrightarrow{j}$+ 0.15$\overrightarrow{k}$)km/hr, Magnitude: 1.61 km, Direction: 6.1° above the horizontal, due N
• C. Average Speed: 2.07 km/h, Average velocity vector: (1.85$\overrightarrow{j}$+ 1.56$\overrightarrow{k}$)km/hr, Magnitude: 1.69 km, Direction: 6.3° above the horizontal, due N
• D. Average Speed: 2.07 km/h, Average velocity vector: (1.61$\overrightarrow{j}$+ 0.15$\overrightarrow{k}$)km/hr, Magnitude: 3.62 km, Direction: 7.3° above the horizontal, due N

Answer: (A)