Solving a Diode Circuit with Varying Resistances

[funsty101]

Homework Statement

A diode with reverse saturation current of 1pA and an ideality factor of 1.15 is connected in series with a resistance of 200ohms and connected to a 5V DC supply voltage. Find the current flowing in the diode at a temperature of 290K? How does the current change when a 800ohm resistance is placed in parallel with the diode?

Homework Equations

The Attempt at a Solution

 

[Defennder]

Well you could start off by providing the equation for current flow I_D in a diode.