analyze this circuit has Vs1 source of 12V an R1 of 2.7 Kohm and split by an ammeter current I2 which we need to find the current there is a reisttor at the bpttom of the ammeter of R2 6.8kohm and is an R3 of 6.8 kohm in series with r1 and another voltage source of 18v parallel to the ammeter in the center and acrross form the 12V