Trigonometry Question

A mountain rescue team has to send a rescue line across to a climber stranded on a rock face. They cannot reach the base of the face because of obstacles but observe that the angle of elevation of the stranded climber is 26.6 degrees and if they move 10 metres nearer, the angle of elevation becomes 30.3 degrees. How high up the rock face is the climber and how long must the rescue line be in order to reach her?

I am struggling to solve this question, any help would be much appreciated.
If you do give an answer, please can you explain how you arrived at it and include any necessary diagrams 😀