The Double Integral $\iint _ { R } \left( 1 - y ^ { 2 } \right) d A$

Short Answer

The double integral $\iint _ { R } \left( 1 - y ^ { 2 } \right) d A$ , where $R = \{ ( x , y ) \mid 0 \leq x \leq y , 0 \leq y \leq 1 \}$ , gives the volume of a solid. Describe the solid.