[填空题]
A right pyramid has apex V and square base ABCD, wuo dgh-0bopwx eme -mh74l9y.9y8g7 aith AB = 3 cm2dz x pa(v48lt. The vertical hei za(vlx4 8dp2tght of the pyramid, VM, is 12 cm.
1.Calculate the length of VA. cm
2.Calculate the volume of the pyramid. $cm^3$