单击命令按钮时，下列程序的执行结果为（ ）。
Private Sub Command1_Click()
Dim a As Integer，b As Integer，c As Integer
a=2：b=3：C=4 Print P2(c，b，A)
End Sub
Private Function P1(x As Integer，y As Integer，z As Integer)
P1=2 * X + y + 3 * z
End Function
Private Function P2(x As Integer，y As Integer，z As Integer)
P2=P1(z，x，y) + X
End Function