i.5.25 Volume of a solid

condition: Find the volume of a body bounded by surfaces: \[ \begin{array}{l} S_{1}: x^{2}+y^{2}=z^{2}, \quad S_{2}: x^{2}+y^{2}+z^{2}=R^{2}, \\ S_{3}: y=0, \quad(y \geq 0) . \end{array}\]