Suppose that R1 = 50 Ω , R2 = 90 Ω , R3 = 80 Ω , R4 = 400 Ω , R5 = 100 Ω , and R6 = 70 Ω .

Part A
Use current division to find the current in R1 from left to right.
Express your answer to three significant figures and include the appropriate units.
Part B
Use the result from the previous part and current division to find the current in R6 from top to bottom.
Express your answer to three significant figures and include the appropriate units.