How to solve

$(50$ points$)$ In the following circuit, $V_{io}=3mV,I_{B+}=0\mathrm{.}4A,$ and $I_{B-}=0\mathrm{.}1A.$

a$)$ What is the best value for the resistor $R?$

b$)$ Calculate the individual error in the output voltage $V_o$ due to $V_{io}$ only.

c$)$ Calculate the individual error in the output voltage $V_o$ due to $I_{B+}$ only.

d$)$ Calculate the individual error in the output voltage $V_o$ due to $I_{B-}$ only.

e$)$ Calculate the individual error in the output voltage $V_o$ due to $I_{os}$ only.

f$)$ What is the actual value of $V_o$ when both input offset voltage and current are present along with $E_i?$