It looks like you've uploaded an image of a geometry problem. I'll analyze it and provide a detailed solution based on the diagram and given information.

Let me inspect and extract the mathematical content from the image first.The image contains a geometric problem with a diagram of a circle and a triangle. Here's a breakdown of the key elements visible:

1. Given information:

   • A circle is drawn with points $A$, $B$, $C$, and $D$ on it.
   • Point $F$ lies outside the circle, and a triangle is formed using points $F$, $A$, and $D$.
   • There are various questions concerning the sizes of angles within this configuration and the properties of the diagram.

2. Specific instructions:

   • It looks like the task is to compute the size of certain angles or verify some angle relationships.

However, the text is slightly blurry, so I will provide assistance based on this interpretation:

1. Part A: Likely asking for the size of an angle, possibly using circle theorems, like the angle subtended by a chord being equal to the angle at the circumference.

2. Part B: Could be asking to prove or show a relationship using perpendicularity or tangents.

If you could provide a clearer portion of the question or confirm any details I should focus on, I would be happy to refine my solution further.