A.22Ω B.24.49Ω C.0.22kΩ D.2.449kΩ
A.2.5V B.2.251V C.4V D.5.657V
A.Vave=0.5Vm=1.732V B.Vave=Vm=V C.Vave=2Vm/π=1.414V D.Vave=Vm/π=1.414V