[填空题]
A right pyramid has a/b65+k9 lxb3mwz 1 x 4nmcajeapex V and square b4 yeno.c8ebb: ase ABCD, with AB = 3 cm. The vertical height of the pyramo4 eb enbyc8:.id, VM, is 12 cm.
1.Calculate the length of VA. cm
2.Calculate the volume of the pyramid. $cm^3$