Answer as soon as possible. I'll upvote. Thank you. Using the given BJT small-signal model, determine the AC current gain Ai = iout/iin for the given circuit. Assume ro >> rπ. You may assume that β is...

Answer as soon as possible. I'll upvote. Thank you. Using the given BJT small-signal model, determine the AC current gain A_i
= i_out/i_in
for the given circuit. Assume r_o
>> r_π. You may assume that β is large. (Hint: Draw the small signal circuit first before working on your analysis.)