The image you uploaded contains three geometric problems. Here's a breakdown of each one:

1. For the triangle $\Delta ABC$:

   • The given information:
     • $\angle ACB = \gamma$
     • $BC = a = 5$
     • $AC = b = 3$
     • $AB = c = 7$
   • The task is to determine the angles $\gamma$, $R$ (circumradius), and $\mu$.

2. For quadrilateral $ABCD$:

   • The given information:
     • $AC = 10$
     • $BD = 6$
     • $\angle AQB = 120^\circ$
   • The task is to find the area of triangle $AQB$ and the circumradius of $\Delta AQB$.

3. For the triangle $\Delta ABC$:

   • The given information:
     • $b = 4$
     • $\alpha = 60^\circ$
     • $\beta = 45^\circ$
   • The task is to find the angles $\alpha$ and $\beta$, as well as the circumradius.

Let me know which problem you'd like to solve first, or if you need further clarification!