1. **State the problem:** We need to find the bearing from point O to point A. 2. **Understanding bearings:** Bearings are measured clockwise from the north direction. The angle given is 78° counterclockwise from east to A. 3. **Convert the given angle to a bearing:** - East is 90° clockwise from north. - The angle from east to A is 78° counterclockwise, so from north to A is: $$\text{bearing} = 90^\circ - 78^\circ = 12^\circ$$ 4. **Interpret the bearing:** Since A is northwest of O, the bearing is $12^\circ$ west of north. 5. **Write the bearing in standard format:** $$\boxed{\text{Bearing} = 012^\circ \text{W}}$$ This means the direction from O to A is 12 degrees west of north.