Trying to understand current dispersal control across a parallel circuit

Using Arduino General Electronics
19

I=(Vin - Vf) / R
I=2/150
I=13.3mA

Question 3:What is the Rtot of circuit 3?

If the supply voltage is 5 volts and the calculated supply current draw is 13.3 ma:
R = V/A = 5/.0133 = 376 ohms = Rtot
150 ohms for the resistor and 376 - 150 = 226 for the LED