I.11.14 Triple integrals

Condition: Find the value of the iterated integral: \[ I=\int_{-R}^{R} d x \int_{-\sqrt{R^{2}-x^{2}}}^{\sqrt{R^{2}-x^{2}}} d y \int_{0}^{\sqrt{R^{2}-x^{2-}-y^{2}}} \frac{d z}{\sqrt{z}} \]