It's my finals tomorrow in Trigonometry and I need to pass. Most of the questions are from the topic bearing. Here are some of the questions that my professor always give. Can you please help me answer these? I also like to have the sketch of this.

1. Two observers A and B are on the opposite sides of the tower 115 m high. From observers, A and B, the angle of elevation to the top of the tower is 57 degrees 17 minutes and 13 degrees 25 minutes, respectively. Find the distance between the 2 observers.

2. A hiker walks 1.5 km on a bearing of 35 degrees. At this point he turns directly south and walks 3.5 km. How far and on what bearing must he walk to return to his original position?