I am stuck at a question (about bias current and offset voltage)

Question

So I was doing the following question from sedra smith microelectronics:

I have managed to do all parts in the question except part d. I am stuck at part d.

The way I have tried is the following: On the non-inverting lead of the op amp, there is a Voltage offset sources attached along with a resister to compensate for the bias current. I used superposition. First I replace the bias current source inside the op amp with an open circuit and so the voltage seen by positive terminal of the op amp is Vos. And then I replace the Vos with a short circuit and also find output voltage. But my answer is not correct. The correct answer for part d is 22mV. Can someone tell me how to solve for part d?

Answer 1

You have this circuit, with total error input of 2.2 milliVolts; Vout is 100X larger.

^{simulate this circuit – Schematic created using CircuitLab}