Question is in image included So, I need to find R2, R3, and Is. I was able to get the correct answer for R3 by doing R3= V/I (R3= 12/1 = 12) . however when I apply that equation to R2 ; R2= V/I. (R2=12/4 =3), I do not get the correct answer. The answer is supposed to equal 4 ohms. Am I using an incorrect method and just getting lucky finding R3? Once I find the value of the 2 resistors, I can figure out Rt and from there find Is.