- $ V = \\\frac{\\\pi }{2}\\\left( {\\\frac{\\\pi }{4} + \\\frac{1}{2}} \\\right).$
- $ V = \\\frac{\\\pi }{2}\\\left( {\\\frac{\\\pi }{4} - \\\frac{1}{2}} \\\right).$
- $ V = \\\frac{1}{2}\\\left( {\\\frac{\\\pi }{4} - \\\frac{1}{2}} \\\right).$
- $ V = \\\frac{\\\pi }{2}\\\left( {\\\frac{\\\pi }{4} - 1} \\\right).$