i really need help with this proplems,i totally stuck from begin.

Given: R1= 2 ohm, R2 =1 ohm, R3= 3 ohm, R4= 2 ohm, R5 = 3 ohm, R6 =3 ohm

1. The voltmeter in the figure give a reading of v =1 V,and the resistances are given. Use the KCL and KVL to determine what the source woltage Vs must be in order to get this measured result. You will need to use both KVL and KCL, one node at a time or one branch at a time

p/s: sorry that my hand drawing picture

KCL = Kirchhoff's current law

KVL= Kirchhoff's voltage law

Vs= voltage source

Is= current source

Here is the Answers:

Vs= 20.666667

v1 = 6 ( where R1, R2, R3 join)

v2= 2 (where R3, R4, R5 join )