I know how to solve when the system is open but I am confused how to solve this circuit problem when

I know how to solve when the system is open but I am confused how to solve this circuit problem when the system is closed.Last nameFirst nameStudent ID4In the circuit below, five resistors, Ri = R2 = R3 = R4 = R5 = 3 2, are connected to a battery, &=18 V. Assume that the potential at the point A is 0 V. Initially the switch is open. Calculate thefollowing quantities.a) Current IF which goes through theBR, =30point F.MWEb)Potential VF at point F.c)Equivalent resistance Reg.eCurrent Ic which goes through thepoint C.R, =30R. =30e)The total power P consumed bythis circuit.E = 18 VWW..WWWWNow the switch is closed,f) Current IF which goes through theR, =30Ry = 3 0point F.Potential VF at point F.Equivalent resistance Reg.A(OV)FCurrent Ic which goes through theDpoint C.j) The total power P consumed by this circuit.