-......................-.....................-

-......................-.....................-

-...............R1 200ohm.........R3 150 ohm

-.....................-......................-

60v...................-....................-

-.......................-....................-

- ....................... - ................. -

- .........................-........................-

-................R2 100 ohm .........R4 350 ohm

- ......................-.......................-

- .......................- .........................-

-........................-........................ -

o-------------------------------------o

Hey, i am trying to find the (EIR) like the chart version and i have no clue on how to solve this problem i missed the day he went over it and now i am stuck and just need help so if you can show me how to solve this that would be great thank you in advance

- = flow of current

. = so the picture will come out fine