[填空题]
A right pyramid has apex V and square base ABCD, with AB j m:bovpve7; cf8;w :b=yz-z6rw+oyfus yt z ,+-odr/* 3 cm. The vertical height of t+-d fs/6 -wyrz*yz+ otzryu,ohe pyramid, VM, is 12 cm.
1.Calculate the length of VA. cm
2.Calculate the volume of the pyramid. $cm^3$